Apparently the original scribe for Lethal Weapon 1(Shane Black) will direct the 5th incarnation instead of Richard Donner if Mel Gibson comes on board.
He’s currently working on “The Edge of Darkness.”
I hope he comes back to acting for this. Though he’s pretty crazy in real life, it fits for the character of Riggs. And, few people can deny that Gibson is a phenomenal actor/director. His reputation has just been tainted a tad bit the past few years.