I have lots of worries. I really liked the last one and what it meant for the force in the universe.
1) Rey being a Skywalker. Bleh. I hate it. I loved that the force might be awakening in other groups. I'm tired of hearing about the Skywalkers. Haven't they messed up the universe enough already? Can't we leave them in the past and have a fresh start for the force? I don't need her to be a nobody, but
2) Kylo being the Skywalker. It's Rey's story. The only thing worse than her being a Skywalker would be for them to suddenly make it Kylo's story. ( I know he is already a Solo/Skywalker, but I mean THE SKYWALKER from the title.)
From the announcements, I feel like it's all going to be a big fan service to everyone who hated the last movie.
Cool alternative. "Skywalker" becomes a title or term for force user since the Jedi are no more. Then there can be LOTS of Skywalkers that aren't from the family.