Lord Beric survived his injuries (he never dies) and continues to lead the outlaws, and their numbers have grown. They are the Rebel Alliance! Arya finds out she's being taken to Beric instead of Rivverrun, so she tries to gallop off, which almost works because she has a fast horse, but Harwin is a better horseman. Arya had better hope that Beric is as fair as they say.
Incidentally, it seems like Ned was doomed one way or another. If his leg wasn't broken he probably would have gone to face GREGOR himself, and would have been just as outnumbered and probably more dead than Beric.