Hate to burst the bubble, but this was their plan from the get-go.
Roy Thomas: "After one adventure which takes place before MJ and Peter were married (but does NOT involve any retro stuff, deals with the Mephisto, etc.), the Spidey strip will return to its fomer continuity, in which MJ and Peter are alive and well and married and living in New York."
You know how where I found that link? Someone posted it on the old scans_daily the very next day after the strip that announced the change. All this stuff about bowing to fan demand is just a publicity stunt.