From legends to legion of doom

At the beginning of dc's legends of tomorrow Leonard snart (captain cold) and mick Rory joined the team of legends of tomorrow to protect the world by traveling to the past and the future, and at the end of season Leonard snart sacrifice him in the explosion to save the world and his team.

Leonard snart sacrifices himself

In this season, mick Rory always see him but nobody are seeing him except Rory because he see him on his mind that its not truly him until Dr. Stein cured him. But on episode 15 he saw him again bit this time it's really him but he's no more legend and he joined the legion of doom to succeed making mick Rory join legion.

Actually its not really Leonard snart because they went back to the time before he joined captain hunter's team. But what is going to happen next? Is they will continue with legion or they will return to be legends again? However the spear finally are on Reverse flash hand.