Count me interested as well.

As for character, I have 4 possibilities (or 3 depending on your point of view) at the moment

Marshal Law: Perhaps could work again here.

Supreme: A superman-like hero with some meta-knowledge, though not to the same level Deadpool has.

Dragonflyman: A costumed adventurer similar to Adam West Batman, who has prior knowledge of dimension hopping, having ended up stuck in the universe of his darker counterpart.

Dragonfly: A costumed adventurer similar to Dark Knight Batman, who has prior knowledge of dimension hopping, having ended up stuck in the universe of his lighter counterpart.