Movies (or trailers) within movies you'd love to see being made

There are several (bits of) movies within movies. Or fake movie trailers. Which ones would you love to see really being made? Some of my favourites:

My top choice: "Fake Purse Ninjas" with Steve Martin and Eddie Murphy (from "Bowfinger")
https://www.youtube.com/watch?v=EteTtXQTmQA

"The Night The Reindeer Died" (from "Scrooged")
https://www.youtube.com/watch?v=TbEi4o232s0

"Good Will Hunting 2: Hunting Season" (from "Jay and Silent Bob Strike Back")
https://www.youtube.com/watch?v=nnESedN4vSI

"Scorcher" and "Satans Alley" (from "Tropic Thunder")
https://www.youtube.com/watch?v=qIeTw7dX8bE
https://www.youtube.com/watch?v=vuziQsUrbeM

"Werewolf Women Of The SS" (from "Grindhouse")
https://www.youtube.com/watch?v=xynLdCh2Uss

"Hamlet" (from "Last Action Hero")
https://www.youtube.com/watch?v=9Eont_yEGZs

"Conan The Librarian" (from "UHF")
https://www.youtube.com/watch?v=mZHoHaAYHq8

Honorary mention:

"Logjammin" (from "The Big Lebowski")
https://www.youtube.com/watch?v=zZ-oafGPkqg

What are your favourites??