I think a new poster is a good idea, if Jeph's up for it.
His art style has improved considerably from both the current character posters, and there are also more characters. It might take several years before he can work out a way to fit them all in
Another idea! Full length, individual character door posters! Human characters anyway. Pintsize, Winslow and Roomba could appear on one together, balancing on each other like in the most recent poster.
Another idea! Bring back the "That's Good Poopin'" poster. I want one