Chocolate and Peanut Butter

I was crazy excited when I saw Ben "Jean-Ralphio" Schwartz plus Will "Gob Bluth" Arnett in the photo below.  But after obsessively rereading the caption I can't tell if Schwartz is actually going to be part of the new "Arrested Development" episodes or if he was just visiting Arnett on set.  I'm really hoping for the former.  What an outstanding combination.