I actually really like Eyecue's idea.
I think this would be a great opportunity for ND to foray into a new kind of sci-fi/action adventure, while also offering a more mature and romance-related chapter to the Uncharted franchise.
It could open the door for a whole new Uncharted trilogy. And just for a shocking twist, maybe in Uncharted 6, we find out that the reason Chloe's baby was an alien-Leno Hybrid is because Drake actually paid Jay Leno to dress as him and bang Chloe because he was too lazy to do it himself.
Plus, the moral of the story could be to always use a condom..otherwise you will give birth to an alien baby like Chloe's.
SHUT UP AND TAKE MY MONEY!!!
that's what I said to elena's voice actor...now she doesn't take my calls.
That's what I said to ND and then they f ed up my game.
I forgot to mention that the leader of the mexican drug cartel is Carlos Perez, a man who bones Rika Raja (off screen of course). Rika has a plan for this man. She intends to have him and his drug carel go to the island where Sully and Elena will bone. So this plot thread is left open in Uncharted 4.
It will be continued in Uncharted 5...
EDIT: Also since Rika is barely in the game, she won't be included in the multiplayer because she doesn't fit in the universe of UC4.