It's a movie! Yeah, we're gonna make a movie!

I can't think of ANY suitable muppet for Toby. In fact, there aren't enough female muppets to go around. There are, however, some wonderfully terrible other casting possibilities:

Kermit and Miss Piggy, as Sylvester & Luna

Prairie Dawn, as Rayseline

Gonzo, as Tybalt

Ernie, as Devin

Fozzie, as Connor

Abby Cadabby, as Dare

Roosevelt Franklin, as Manuel

Menohmenoh Guy, as Danny (You were thinking "Animal", weren't you?)

Sam the Eagle, as Winterrose

Scooter, as Quentin

Beeker, as Spike

Oscar the Luidaeg

Sweetums, as the Redcap

An Anything Muppet, as the Doppelganger

Elmo, as Ross (so we can watch him die painfully)

Statler & Waldorf, as Safeway co-managers