Which are two different films that when merged into one would somehow still make sense as a movie?

Thinking and following….

Twilight and Interview with a vampire
2012 and Waterworld

The Swiss Family Robinson
The Island of Dr. Moreau

Bell, Book, And Candle
Practical Magic

Blithe Spirit
The Ghostbusters

Twister
The Wizard Of Oz

This is a great question, but I may need to give this one some thought.

I Robot
Terminator

No country for old men
Pulp fiction.

Plan 9 from outer space
The last jedi

Jaws
Sharknado

Die Hard
Towering Inferno

The Big Chill
Home for the Holidays

Buffalo 66
The Big Lebowski

2001 A Space Odyssey
Impact.

(I thought of one!! I am so excited! That was hard.)

^^Deep Impact? :)

Oh crap. I mean Armageddon, actually. Not “Impact” anything.
Gosh dang it. I finally came up with one and I failed.

Godzilla, and Cloverfield.

Baby’s Day Out
Rosemary’s Baby

: )

This has actually been done before with a TV show: Robotech.
It was a combination of 3 separate unrelated shows from Japan (Super Dimension Fortress Macross, Super Dimension Cavalry Southern Cross, and Genesis Climber MOSPEADA). They crowbarred these three shows together in order to create a series long enough to be syndicated in America. The mashup actually worked out, and most people had no idea that they were watching an altered show.
As for movies that can be combined, that would be: Alien and The Cube

^^Thanks. So that’s why Robotech felt…mashed. : )

I loved Robotech. I haven’t even thought about it in many years. I had a couple tapes of it, when I lived overseas. Watched them hundreds of times. I think I had an action figure too. One of the jet robot things.

Thanks for the nostalgia!