Killing Pike won't enhance the plot one bit.
It would be a pointless death just because the writers want some...thing dramatic and sad and to push the hero into action.
So Jim sees his father figure die and wants revenge...sorry justice? Would be a better plot twist to have the old guys save the younger generation who get in too deep? Bet marketing execs and infantile producers aka the kids won't like that!
3somes with Cat women? Well they did steal the poster idea may as well steal the characters too.