Legendary has pushed‬ from November 4, 2016 to March 10, 2017 and revealed an official synopsis that teases a "an entirely new, distinct timeline"
http://www.superherohype.com/news/324697-legendary-moves-kong-skull-island-to-2017
Micheal Keaton in talks
http://www.comicbookmovie.com/fansites/notyetamovie/news/?a=113285
if he joins we'll have Loki, J. Jonah Jameson & Batman.
This hasn't been updated in a while, Micheal Keaton & JK Simmons has left the project
Toby Kebbel is in negotiations to join same with Sam Jackson a while back
Godzilla vs King Kong reportedly in the works as Skull Island moves to Warner Bro's