Status: TBD
While we haven’t seen Nymeria yet, there’s no ruling out her possible return sometime soon. Arya’s coming back to Westeros, so it seems like the perfect time for a reunion.
Original Theory: After banishing ber beloved companion, Nymeria, in the Riverlands during season one, Arya has grown quite a bit — and so has her direwolf counterpart. While Nymeria hasn't come up again in the show, it's heavily implied in the books that she continues to roam the Riverlands with a pack of wolves, hunting. Given the Stark clan's strong connection with their house sigil animals, many believe that Nymeria will make a triumphant return at some point . . . and it could very well be this season.
