I'm still hoping there's no flashbacks. Want to explain a character's sudden change of heart, or justify an odd plot twist? Plug in a flashback. It comes off as sloppy, especially when the closest we've seen to one in the saga thus far is a Force vision. (Unless you want to consider the P.T. one big flashback.)
im a huge JJ fan, i know he loves his flash backs. at first once i heard he was going to have them in star wars i felt little uncomfortable, i now think you can pull it off. but i understand where your coming from by showing a flash back to answer a question it kinda feels like a rip off..
again 30years apart from the last film i think a few flash backs won't hurt filling in gaps