History
This Deadpool's life followed the same path of his Earth-13729 counterpart's, up to the point Raze convinced his half-brother Charles Xavier II that the Brotherhood should go back in time, and defeat the X-Men before they had mastered magic and tech. Prior to departing from their timeline, however, the Brotherhood received a letter from Earth-13729's Raze, who had already traveled to the past alongside his team. It contained instructions in how to try again and win.[1]
Deadpool was one of the Brotherhood members who were sent back in time to replace their lost counterparts among the team's ranks in the past,[2] as his counterpart had been killed in a previous confrontation against one of the X-Men teams of the past.[3] He and the other mind-controlled members of the team (namely Beast, Ice Hulk, and Molly Hayes) were forced by Xavier to help him and Raze try to kill the time-displaced Jean Grey, but they failed and, in the confusion that ensued, Xavier lost control over them. The X-Men later helped them go back to the future.[4]