When Kermit Met Piggy...

[Ruahnna]

If I might hazard a short guess--and YES, I can be brief--I would say that, belive it or not, it was an attempt to be safe. Who doesn't love Gonzo? And with the wonderfully talented Dave Goelz at hand,n and an established, loved character ready to star, it must have seemed like a shoe-in. It also allowed them (sortof) to side-step the Kermit-Piggy relationship, which just wasn't going like it should. Steve seems fine with Frank as Piggy in TMI, but here, it's as though Kermit and Piggy had never met before except on stage. Maybe Steve's voice as Rizzo--which was so well-featured here, interfered with him developing Kermit at this point. Kermit's not himself in this movie--he's passive and not supportive of Gonzo like the Kermit that would allow Gonzo to eat a tire to the tune of "Flight of the Bumblebee."
Okay--for ME, that IS short.