Suggestions by @mycasteeeeeeeee

Eiza González

as Catwoman in DC v Marvel

J.K. Simmons

as Commissioner Gordon in DC v Marvel

Ralph Fiennes

as Professor X in DC v Marvel

AnnaSophia Robb

as Supergirl in DC v Marvel

Finn Wittrock

as Nightwing in DC v Marvel

Aidan Gallagher

as Robin in DC v Marvel

Finn Wolfhard

as Cyclops in DC v Marvel

Viggo Mortensen

as Magneto in DC v Marvel

Jurnee Smollett

as Black Canary in DC v Marvel

Sadie Sink

as Phoenix in DC v Marvel

Ben Affleck

as Batman in DC v Marvel

Noah Schnapp

as Nightcrawler in DC v Marvel

Jeremy Ray Taylor

as Beast in DC v Marvel

Jordan Peele

as Beast in DC v Marvel

Storm Reid

as Storm in MARVEL Cinematic Universe (MCU)

Jeremy Ray Taylor

as Beast in MARVEL Cinematic Universe (MCU)

Noah Schnapp

as Nightcrawler in MARVEL Cinematic Universe (MCU)

Landry Bender

as Rogue in MARVEL Cinematic Universe (MCU)

Isabelle Cornish

as Crystal in MARVEL Cinematic Universe (MCU)

Anson Mount

as Black Bolt in MARVEL Cinematic Universe (MCU)