He should reach out to Hideo Kojima. The Lethal Weapon franchise has clearly been a source of inspiration for the man as seen in Policenauts and Metal Gear Solid 3. Kojima is still popular, his studio seems to be doing well, and he has always wanted to be involved in a Hollywood movie.

Rebirth was fantastic and works as a stand alone game. I think it will be ed as the Empire Strikes Back of the trilogy. Not only does it put many other games to shame for it's depth and content but it leaves fans wondering what could possibly happen in the final installment. It deserved much more success than it received and hopefully will not convince SE and others to put less effort into their releases moving forward.