Oliver Stone for Alexander or Martin Scorsese for The Aviator? Hmm... I don't think so. There will be two Alexander movies, and both will suck (the other is made by the Moulan Rouge director, who ALSO blows ass), and Martin Scorsese hasn't done anything worth talking about in 15 years or so.
Their time has passed.
However, rottentomatos.com has 100% good reviews of Kill Bill Vol. 2, which is incredibly rare. Everyone is a fan, and, even though there are only 15 reviews at RT so far, it's an impressive feat. Look for a few nominations at the oscars. Vol. 1 was a dark horse for some nominations, and it wasn't even recieved as well as Vol. 2 is.