i can't see them going for the obvious ones here (Iron Man and Cap and so on) but i can see this being used to revive some dead characters by revealing that the ones we saw die were really skrulls.
so the second question needs to be, if you could give 'skrull immunity' to any character so marvel doesn't bring them back from the dead, using the skrulls as an excuse, who would it be? uncle ben, gwen stacy, hawkeye, microchip?
oh no, i hope this isnt how they are bringing back Thor...