So ok, I haven't played any UC games yet (I actually own 1 & 2, just haven't played them yet), so please don't spoil anything - but WHY couldn't Nate be in UC4?? And why would it be set in 1739? I think JoetheBro is on to something here though; maybe Nate will run of to Madagascar to find an artifact or whatnot based on the book by this Robert dude...
I'm on Twitter @DanneSandin!
Furthermore, I think VGChartz should add a "Like"-button.