He'd be able to fight Reacoom long enough to stall him until Goku arrives, if not defeating him. Once Goku did arrive, he'd head back to Saichoro's house which is where the story can take two roads; either Saichoro has told Freeza that killing him will deactivate the Dragon Balls and Freeza is negotiating with him,or Freeza has already killed him. In the former, things go relatively the same as in the main timeline. In the latter, Freeza kills everyone.