We have not dealt with Kindred for awhile.These are my suspects.
A: Harry. B: Ned Leeds. C: Crime Master. D: Gwen. The one who fits every box is Ned. He despises Peter, died, was in the Ditko run, and became a supervillain and probably went to Hell. The only hesitation I have is Spencer likes the obscure character and seeing Crime Master in the Original Gwen comic makes you wonder? The only thing is what would he have against Peter? Opinions?