I'll try to recap what I have written before:
1. A squad based shooter on JUNGLE environment, Crysis like physics (choppin' dem trees with mah machine-gun). Yes, I have Conflict: Vietnam, but that's not what I would like to see.
2. Imagine if you will an Assassin's Creed game that was not open world, not as repetitive, original assassinations with lots of options like in Hitman, stealth and cool items/"gadgets" like Thief (water arrows? Awwww yeah) but also a more fast paced combat system like Prince of Persia. No Italian revenge stories, no Leonardo DaVinci "this could actually have existed" bull, no worldwide conspiracy.
So basically like Assassin's Creed but not even comparable to Assassin's Creed.