Well, lets take this with a considerable gain of salt, as it seems to be largely speculation and not from an entirely reliable source (although they have had their moments), but could Sony be looking to liquidate assets, specifcally their entertainment division?
Would the rights automatically revert to Marvel? Would Marvel/Disney get the first bid at the very least? Intriguing possibilities.
How would you want this to effect the sequel? Would you want Marvel to continue with this franchise, or decide to do their own thing?