^^^^^
I think we can go by his track record.
I didn't like his Trek movies because I didn't feel that they were faithful to the Trek universe. Abrams himself said he had never been a fan. But Alias, Fringe, Lost, Super 8, and Cloverfield were all pretty amazing (with some hiccups here and there). He has said he's a fan of Star Wars and he is definitely inspired by Lucas and Spielberg. I really think that we are in for an awesome ride with the new Star Wars trilogy. And really, for those of us old enough to remember, how long has it been that we were excited by the build up to a Trek movie? 1999? 1982?