because it's not his, it's 'theirs'
Slott is a weird person for the fanboys to go after - he's almost too much of a fanboy to put Spidey through the wringer the way he really should be (i.e. the way the character works best as a story engine). Instead, he is gradually becoming a Mary Sue - learning kung-fu, getting all these cool Batman gadgets so he can meet any threat, getting rich and recognized as a scientific genius, recognized by his peers in the Avengers/FF, still a chick magnet, no longer has to deal with Aunt May etc...I think all that stuff is fun but it's dangerously close to fan-fic. Long-term, the book is probably better in the hands of someone not quite so in love with the character. (and this is not to say that Spidey hasn't gone through some shit under Slott - of course he has, it's a cape comic. Just noting a general trend).
Anyway, let's get real - i haven't read the spoilers above but there is no scenario in which Peter Parker will not be Spider-man for an extended period no matter what happens in 700