Probably, but not right after. Truthfully, I don't know why they are even making it available. I have Kaa's Jungle Gym being built right niw, and every single building fits within the existing game board.
With Aladdin, Lion King, and now Jungle Book being offered, I'm really glad that the interns opted to open Frontierland instead of, oh, say, Adventureland. Makes a lot more sense to give is Big Thunder Mountain than the Jungle Cruise. Oh, and placing King Louie's temple in Frontierland? Brilliant.