Cyclops

Scott Summers leads the X-Men and cannot open his eyes without a visor. The discipline that requires is the character: a man whose power is permanently one blink from catastrophe, who has organised his entire personality around control.

James Marsden returns from the original Fox continuity, which is the clearest signal available about what Doomsday is doing. This is not a recast — it is the same universe arriving.

Whether the X-Men fight alongside the Avengers or across from them is exactly the question the marketing has refused to answer.