The Legends have absolutely zero clues where Rip could be, with no method to actually track him down.
They’ll keep busy dealing with Reverse Flash and theLegion of Doom, but Guggenheim promised that fans will know what happened to Rip before the Legends will.
Marc Guggenheim went on to say that just because Sara is now the leader of the Legends, it doesn’t mean that they won’t still search for Rip.
That particular quest will often take a backseat to the larger plot at work, but in some episodes it will be in the foreground.