That would be cool
But the entire point of canon is that it's continuity, doesn't matter if everyone wants it to be or no one does.
Like marvel, after Sins Past is retconned just make it canon.Whatever you do canon or not just say it man
Also why would anyone not want it to be canon, like it's Blue(on of the best stories ever) vs Sins Past(the worst story like ever).I mean even if they retcon SP which hopefully happens, Blue still has all advantages right?
I guess people who hate Gwen or who want MJ to be Peter's first?(Not saying both are same btw, I can't seem to frame it better.I'm saying one or the other or both for few) don't want it to be canon.
I feel there is no other reason to not have it be canon