Nothing is too terrible to do to Gwen Stacy
For the first time, I can say mainstream comics went there before Scans_Daily!
In What If The Other, Spiderman becomes a symbiote hybrid (he names himself Poison). He returns to his wife, who is still with hte Avengers. MJ rejects him as too unPeterlike and he is driven away. He goes and digs up Gwen Stacy's grace and animates her corpse with a portion of his symbiote self.