Too lazy to take pictures of this, but let's watch anyway and point out all the gags they're shoving into the background.
Now, Fiverine is obvious, but we know about him. As well as Leila as Leia and Bat-Elmo. As far as the unreported ones go...
Super Marios wearing the number 3
Mando is Dr. Two (the fourth doctor- I guess it's too iconic to make him the second one) complete with a Muppet Dr. Who (can't remember which one) and Daleks going "Numerate!"
Muppet Captain Kirk complete with Shatner speak
Princess Bubblegum cosplayer at the Fiverine table
closing with obvious Comic Book Guy from the Simpsons Muppet. If only specific for using his catchphrase.