Ultimate Spider-Man Ending?

Wow. They kept that one quiet.

I don't expect Spidey to be The Blob's dessert, but it's obvious from the recent developments that Bendis is probably preparing an Ultimate Spider-Woman series

Doubtful.

They'll probably just reboot and change the name or make it #1 or something.

I doubt they'd kill off that popular of a comic. Especially with the way Marvel has been going these days.