Quite a few names have been mentioned on the internet.
Not sure if this has already been asked in another thread.
Two names that are already obvious are J.J. Abrams and Joss Whedon.
Christopher Nolan, Peter Jackson, Matthew Vaughn were also mentioned.
How are they going to get around the DGA situation though is beyond me.
Most of the big name directors are already attached to films for quite a few years to come. And the less known are probably who will be chosen.