2 & 3. The Wachowski Siblings
Why it could be them: If there's one thing the Wachowski's have proven over the years, it's that they can do anything effects-wise that they can imagine. They revolutionized visual effects with The Matrix, guided James McTiegue to greatness with the largely misunderstood and underrated V For Vendetta, and are currently blowing minds across the world with Cloud Atlas - a crazy sci-fi epic with a heart, if there ever was one. Also, since Larry became Lana, they seem less introverted and generally happier, which could lend the kind of confidence one would need to attempt directing a new Star Wars film.
Why it won't be them: Aside from the fact that they have Jupiter Ascending on their horizon, which might grow into a trilogy, their track record might work against them here. As much as everyone loves The Matrix, the Wachowski films since then have proven to be more divisive than not. Speed Racer, while having its fans, is widely derided and Cloud Atlas isn't without it detractors either. Personally, I think they would be an inspired choice, but it won't happen.