This isn't a 'remake', Bullock is playing George Cloony's character's sister. They are leaving the door open for cross over of cast, whether in this movie or in a future one.
Anything saying Jen is in this is wrong. Her people quickly said no she couldn't, her schedule is full, the first time the rumor started, but then gossip magazines kept repeating it to the point where some people actually thought it was so.
I'd rather have a mixed cast of main characters, personally, if there are that many. But if this is a good movie I will go see it. That it has anything to do with Ocean's Eleven won't be the reason, though.