It will be George Lennon.
Abrams is going to direct Star Wars 7. It'll come out Summer 2015 and make a ton of money probably double or triple STID take. Everyone will want him to do the next one and he will not do Trek. Best to let someone else do the next Star Trek now so we can have it in 2015 or 2016 instead of waiting another 4 years. This is assuming we get another one!