This discussion may contain spoilers!
We all know he dies in episode 2, which is determinant. So obviously he's going to die for sure (confirmed by the writer in playing dead). The writer (which is doing a horrible job, IN MY OPINION) said how they'll get to work out their death and presence for 1 or 2 episodes is going to be the struggle.
So anyways.. I think when rebecca gives birth, the baby would come out black (not mixed) and carver would be pissed or something and retaliate by either beating up alvin (as seen in ep 3 preview) or killing him all together.. Which i think either way leads to him dying by that. Or that like the baby comes out to be carver's and he kills himself from shock/depression.
And as for nick, it's probably going to be him fucking up or something not very creative (like in episode 3). I wish telltale lived up to their "choices matter" thing. In all reality, choices really don't matter since characters die no matter what, and we all have the same ending.
So anyways what do you think?