But we know the wild card completes all 4-straights, completes all 4-flushes, has trips on all paired boards, turns all 2-pair hands into full houses, turns all flush draws (with our other card) into flushes and all straight draws into straights, turns all 1-pair hands into trips or better, etc. Short of that, we could do some manual counts of basic board types and get a good idea. Somebody would have to modify a hand enumerator to count all C(49,5)=1,906,884 possible boards in such a game and evaluate all 49 wild card values against each board.