I don't know if this is the right thread for this or not, but concerning the subject of the possibility of Walter merchandise, I've noticed that whenever there's a new Muppet movie featuring new characters, the new characters pretty much don't get made as toys when the movie is out and being promoted (later toys from Palisades don't count). The only such toy I know of is a Mad Monty PVC (I think Polly Lobster was sculpted into that toy) that got released when Muppet Treasure Island came out. And MTI had the biggest number of interesting original characters.
If there are more series of these puppets, I don't think we'll get a Rizzo or Pepe until at least series 3, considering their small roles in the film.