When is it going to occur to people that the whole "you killed my girlfriend, prepare to die!" cliche has been done so very many times. There are countless action movies that begin on that premise, it's happened over and over again in comics, it's a total writer's crutch to add a dead girlfriend or dead wife into the picture, it's instant pathos. People are still under the impression it's so "dark" and so "tragic" and "unique" but it isn't really, even in Gilgamesh (one of the first pieces of literature) he avenges his girlfriend's death. One of the primary issues with Spider-man as a character is that in order for him to advance, virtually everyone around him must be horrendously distorted. To keep his angst up, Gwen had to have two continuity-improbable twins, Mary Jane's whole relationship with him had to be retconned, Aunt May has been replaced by an actress to die a fake death...his evolution as a character seems to come at the cost of everyone else around him. It's a very self-centered, woe-is-me comic sometimes and I think it really hurts the franchise. I see bringing Gwen back as a fascinating challenge, it would actually be a risk in storytelling rather than creating all this post-mortem melodrama.