I have read a similar fic on the Quidditch Pitch to Seven Steps to Heaven. In the one i read the resurection stone was used to bring Snape back to life, with some help from Harry, the Malfoy family and some very dark magic.

I just had sticky on the QP and the story i'm talking about is called Blood and Memories by Ricky A.

Your summaries of these fic's have piqued my interest so I am going to join the snape_potter comm and see what else is on offer.