I haven't heard that before but I would t be surprised.
I've always considered Slott to be a closet marriage fan, despite his supporting the removal.
He needs to keep his job and tow the company line, but can you imagine someone with an encyclopaedic knowledge of Marvel history being happy about the removal of 20 years worth of adventures about his favourite character?
Look to Spider Island, look to Renew Your Vows. The proof is there in his work. Even the way he way he writes MJ as a Spider groupie is so bad it's comical, like his way of saluting OMD with the middle finger, it's in the little details where his true thoughts on the matter are apparent