I've been following the DC movie universe for what feels like forever, and even here in 2026, there are so many iconic characters whose big-screen debuts still hang in the balance. Back when the DC Extended Universe first started expanding rapidly, we got a flood of exciting project announcements—and with them, a wave of speculation about who would fill the capes, cowls, and cosmic rings. Some of those dreams have come true, but a huge chunk of the wish list remains tantalizingly unconfirmed. Let's dive into the casting reveals I'm hoping to see drop any day now, the ones that'll finally connect the last pieces of this sprawling, connected world.

Poison Ivy – Gotham's Lethal Eco-Warrior

When Gotham City Sirens was announced as a sort-of Suicide Squad spin-off, my mind immediately went to Pamela Isley. Poison Ivy is the most obvious candidate to join Harley Quinn on screen—their relationship goes back to Batman: The Animated Series and has become one of the most beloved partnerships in modern comics. I'm envisioning a Thelma & Louise with superpowers: a powerful, independent woman who shows Harley there's life beyond pining after the Joker. The DCEU already established a world where villains use fantastical abilities for gritty, reality-based crimes, so it's easy to picture Ivy strangling climate-change deniers with giant plant tentacles. Her presence would bring both thrilling visuals and genuine emotional stakes to the Sirens team.

Zatanna – Mistress of Magic

Doug Liman's Dark Universe was a jaw-dropping reveal, and it opened the door for DC's magical realm to finally get the spotlight. Zatanna Zatara, a stage magician who casts real spells, is practically tailor-made for this team-up. She's connected to nearly every corner of DC lore—including Batman himself—and her legacy as the daughter of the powerful Zatarra gives the universe a sense of history it desperately needs. I can't wait to see her backward-speaking incantations and dazzling illusions brought to life; she'd be our perfect guide into the shadowy, supernatural side of the DCEU.

Green Lantern Corps – Hal Jordan & John Stewart

Of all the major Justice League characters still not officially cast, Green Lantern tops my list. After the 2011 film stumbled, WB has taken its time, but the upcoming Green Lantern Corps sounds exactly like what we need: a "buddy cop movie in space" featuring multiple human Lanterns. The dream dynamic is Hal Jordan as the veteran ring-slinger teaching John Stewart the ropes of intergalactic policing. That way we skip rehashing Hal's origin and instead explore the wider cosmos organically. With the Corps movie still supposedly on the horizon, I'm checking my phone every week for news of who'll wear the emerald rings.

Black Manta – The Ruthless Aqua-Hunter

Black Manta isn't tied to the politics of Atlantis like Ocean Master; he's a wild card driven by personal pain and an obsessive hatred for Aquaman. Every version of his origin is tragic, and that makes him a fascinating chaos agent—imagine Darth Vader coming at you underwater. His iconic helmet and ruthless methods would add a terrifying edge to the undersea saga. I'm fully expecting him to be a scene-stealing, revenge-fueled force of nature whenever he finally appears.

Batgirl / Oracle – Barbara Gordon

If Gotham City Sirens blends heroes and villains, then Barbara Gordon is the obvious choice to represent the hero side. With Batman having operated for over two decades in this universe, Barbara could easily be introduced as Oracle—the wheelchair-bound master hacker who leads the Birds of Prey. That would instantly show that Gotham's battle has taken a heavy toll and reinforce a powerful message: physical ability isn't a barrier to heroism. Whether she suits up as Batgirl or operates behind the scenes, I'm desperate to see her brain and bravery anchor a corner of the DCEU.

Sinestro – The Fallen Lantern

Say what you will about the 2011 Green Lantern, but Mark Strong's Sinestro was incredible. Since the series is being rebooted, a new actor will step into the role, and I can't wait to see the once-great Lantern who now wields the yellow power of fear. With Hal mentoring John Stewart, the idea of Sinestro lurking in the shadows as a kind of Green Lantern Voldemort is utterly compelling. He's more than a mustache-twirling villain; his history with Hal and his twisted sense of justice could make him the DCEU's most complex antagonist.

Nightwing – Dick Grayson

We know from Batman v Superman that a Robin died, and it's practically confirmed that was Jason Todd. That means the first Robin, Dick Grayson, is almost certainly out there as Nightwing. The tense father/son dynamic between Bruce and Dick always frays, leading Dick to strike out on his own. After the events of BvS, a Nightwing who reminds Batman why he's a force for good would be exactly the emotional heartbeat this universe needs. I've got my fingers crossed that the persistent rumors of his introduction pan out.

Black Mask – The Mobster with a Skull Face

Deathstroke is already expected to appear in Batman's solo venture, but I'd love to see Roman Sionis as a secondary villain. Black Mask splits the difference between Gotham's traditional mobsters and its freakish nightmares—a murderous sociopath whose distinctive skull mask got fused to his face. He embodies the gritty yet grotesque vibe of the DCEU's Gotham perfectly. A black-masked crime lord pulling strings while Batman deals with super-assassins would add a delicious layer of urban menace.

Catwoman – Selina Kyle

Whether she slinks into The Batman or Gotham City Sirens, Selina Kyle is a sure bet. Her morally gray cat-burglar persona—just as likely to be an ally as an enemy—makes her one of the most exciting characters in the DC toybox. After 20 years of Batman's crusade, their complicated, decades-spanning relationship would be fascinating to explore. I'd love to see her bounce off Harley and Ivy in a madcap adventure, but that deeper, conflicted history with Bruce is where the real gold lies.

The Rogues – Flash's Colorful Criminals

Central City's rogues' gallery is arguably the finest outside of Batman's. The Rogues—a loose alliance of criminals like Trickster, Mirror Master, and Heat Wave—operate under a strict code: no killing unless absolutely necessary, and always respect each other's legacies. This unusual honor among thieves makes them delightfully eccentric foes. Captain Cold typically stands out as their calculated leader, and bringing the whole crew to the big screen would inject the Flash's solo adventure with a unique blend of menace, humor, and tragedy. I'd love to see a film where the Rogues are practically co-leads, giving the Scarlet Speedster a formidable but strangely human opposition.

So many incredible characters are still waiting in the wings, and every new announcement feels like a holiday. Whether it's a magical Zatanna casting or the reveal of who'll wield a power ring, I'll be here refreshing my feeds until the DCEU shows its full, glorious hand.