It is not uncommon for a major comics crossover to end in the death of a character. Marvel’s Secret Invasion was no exception. A so-so crossover written by Brian Michael Bendis and drawn by Leinil Francis Yu, the big death at the end was Janet VanDyne, the Wasp, on-again, off-again lover and ex-wife of Hank “1,000 Codenames” Pym.
She’s not currently dead. I’m not sure how she managed to come back, but she’s not dead anymore. So, really, did it matter?