Okay, these two cover theme games were not guessed last time, so here's another chance, now with CLUES!

Also, people guessed the general theme for #1, but I actually had a crazy specific theme for this one, so I'll leave it, too!

GAME #1

M. Bloom guessed that "These covers all feature characters who aren't who they seem to be," which is true, but there's something more than just that!

GAME #2

HINT: The keys to this cover theme are events that took place after each of the three characters above were introduced.

GAME #5

HINT: This one is very simple, but also extremely EXTREMELY obscure.