Replace every cast member with muppets except one

[Pink Ranger]

Snowpiercer - Keep Chris Evans

Snowpiercer would be interesting if it was straight-up Muppets except for Ed Harris. Think about a Dark Crystal-meets-Dark City like scenario, super-serious with all these violent puppets, and then boom, a human shows up near the end to deliver the plot's turning point.

 

[Breogan]

Most of the evil aliens are essentially muppets anyway.
As the only humans keep Bulk and Skull (they pretty much act as one)

 

[Airwings]

Room: Keep Jacob Tremblay

Hahhaha, that was a funny one! It would be a complete Muppets movie, because of how ridicoulus it would turn out. I mean the first part, a boy in this small chamber interacting only with puppets. They should also have laughter and applause in the background.

Titanic: Keep Kate Winslet

.
What about keeping Leo Instead? Surreal.

Or keeping Billy Zane AND the butler (if I can pick two)? It would really turn out really, really weird​

 

[Airwings]

LOTR trilogy, keep Gandalf

 

[Schlosser85]

Knives Out, keep Daniel Craig. Investigating a cast of muppets.

Joker. Keep Joaquin Phoenix. Even more surreal.

Birds of Prey. Keep Ewan McGregor.

 

[Doctor Jones]

The Star Wars prequels. Keep Ian McDiarmid.

 

[Kahran Ramsus]

Once Upon a Time in Hollywood - Stuntman Brad Pitt and former washed-up western television star Kermit the Frog struggle to hold onto the scraps of their careers in 1960s Hollywood while encountering the psychotic Muppet Family and their mysterious leader Charlie. Special appearance by Miss Piggy as the star of The Green Hornet.

 

[Pink Ranger]

Eyes Wide Shut: Keep Nicole Kidman
Ocean Trilogy: Keep Brad Pitt
Nine: Keep Judi Dench
Mean Girls: Keep Rachel McAdams
Me Before You: Keep Emilia Clarke
Nell: Keep Jodie Foster
Lord of the Rings trilogy: Keep Viggo Mortensen
The Green Book: Also keep Viggo Mortensen
Eastern Promises: you know....

 

[David H.]

Lord of the Rings trilogy: Keep Viggo Mortensen
The Green Book: Also keep Viggo Mortensen
Eastern Promises: you know....

i was going to say The Road as well but I think I’d prefer that with Kermit and Robin traversing the desolate remains of civilization and confronting the frightening notion that no such thing ever even existed in the first place...

Spoiler

Keep Guy Pearce and his family at the end, I guess.

 

[Airwings]

Karate Kid, keep Ralph Macchio and mother. They move to a place where only muppets live. He starts dating one, then is beat up by others.

Terminator 1 + 2, keep Arnold

Predator (1987), keep the predator

Transformers (2007), keep the robots

Thor (2011), keep the asgardians. Humans replaced with muppets

Unbreakable, keep Mr Glass, the only human in a world of muppets.

Panic Room, keep mother and daughter. They're hiding from invading violent muppets

Sixth Sense, keep everyone alive…. all dead ones should be muppets. (except X because it would destroy the twist)
"I see dead muppets"

Fight Club, keep Edward Norton. Imagine how the twist would turn out then :P

First Star Wars prequel (1999), keep little Anakin, everybody else as muppets, even the jedis.
Being the chosen one truly means something different here.

Superman (1978), keep the kryptonians, wich means the parents actually sent their baby to a planet of muppets