I just hope we won't have to wait another 4 years for it.
Considering Disney apparently wants to do a film every 2-3 years, I don't think they're going to let any director wait four years to do a sequel.
Disney and Lucasfilm still haven't confirmed this yet so it's still wait and see. I've been of a fan of JJ since Alias. I loved Lost and thought he saved the Star Trek franchise with the last film. He's got definite flaws as a filmmaker and writer but I think he's a good choice for this.