Uziel is best known for his comedic horror, "The Kitchen Sink", and his webseries, "Mortal Kombat: Rebirth". There has been no confirmation on who the director will be, but Barry Sonnenfeld("Get Shorty") directed the first MIB films, and being a consistant director, the bet is that he will be returning.
But will Will Smith return? ComingSoon.net asked Smith about this last year at a MIB junket and got this reply:
"We'll have to see what people say," Smith said. "If there's a good reaction to this movie, it's not something I would be against. Hopefullly we're not going to keep the same pattern. It was five years between the first and second and ten years between the second and third. That would be twenty years. I'll be 63 years old. It's just not a good look."