How many characters from Trek have died and been born again? I've lost count.
Having said that, I find it unlikely they'd drop Pine from the lineup. He and ZQ are carrying this franchise and doing it fairly well so far.
But still... no one stays dead in the Trekuniverse, JJ or Prime. Trek Zombies are everywhere: Tasha Yar, Spock, Jennifer Sisko, Trip, etc. they're all just a quantum flux inverter away from reappearing to stir frantic emotions in the rest of the living cast. And according to TNG's Parallels there is an infinite number of universes from which to plunder replacement heroes.