of course my speculation could be way off, but here's why i'm kind of favoring the Bezos purchase:
i've heard he's not really a sports fan and definitely not a Celtics fan. this could be very bad, but it could also mean that he would let Wyc and Pags govern, which means Brad and Mike run the front office, which means Joe dictates his coaching staff and there's plenty of money for the guys on the floor year after year.
i'm not sure the other groups (Fenway, in particular) would be as happy with a hands off approach. we're in a good spot now. the least intrusive new owner is probably best and that could be the guy who oddly doesn't care that much and can afford to not care that much.