Replace the characters with Titanic characters
Jack & Rose be the ones with their memories erased and implanted with new ones, Lovejoy be the one getting his arms ripped off and Cal be the one with his eyes popping out, Jack be the one to turn on the reactor.
First half be Titanic in space, a interplanetary liner travelling to Mars, second half be Total Recall.
Cal not being told Rose is a brainwashed double agent and their whole engagement is a sham.