We can say "If" all day but in reality they both left. However, "if" either of the two stayed, I am not sure how different the WWE would be. Lesnar would probably be on Smackdown and probably would have challenged Taker's Wrestlemania streak at some point in his career. As for Angle, I wish he still was in WWE because I would love for him to feud with Randy Orton. I know they have feuded before but not with Orton's viper gimmick. If both had stayed then we would have seen great matches, for example Lesnar/Tripe H, Lesnar/Cena, Lesnar/Taker at Wrestlemania, Lesnar/Randy Orton, Kurt Angle/Orton, Angle/Jericho, Angle/Edge, Angle/Bryan, Angle/Swagger. I know many of those have already occured but it would be entertaining to see rematches later on.