Scifi themes or characters that could be twined (possible rip offs)

[Manchurian Taikonaut]

Starwars C3PO
Robot Maria Metropolis.

Rebel androids Blade Runner
Rebel androids Galactica
Rebel Androids Screamers
Rebel Androids Matrix
Rebel Androids.....

Lord of the Rings Wraith
Divine Shadow Lexx
Anubis Stargate

Alien invasions in War of the Worlds (remake included)
Alien invasions in independence day ID4
Alien invasions in V the mini series

River Serenity
Buff Vampire Slayer

Are there any other movies films where you think, "hey I've seen that before"

[3rdvogon]

Scientists on earth pick up a signal from deep space that provides them with the design specs to build a new and powerful machine.

A for Andromeda
&
Contact

This is not strictly SciFi but it was uncanny that these two films dealing with a similar theme were released at the same time

Dr Strangelove
&
Failsafe

There of course there are the big rocks falling from the Sky

Meteor
Deep Impact
Armageddon
Plus some other unmentionable TV derivatives.

Then big lizards going on the rampage in the city
Beast from 20,000 Fathoms
Godzilla 1,2,3,4 etc etc
Jurassic Park 2

Give me more time and I am sure I can think of some others

Drilling vehicles that carry people deep below the earth where they discover a new world - I think that has been done more than once.

Societies in space where the women rule - A fashionable idea in back in the 50s 60s & 70s but a bit passe and irrelevant now.

[Delvo]

Rebel androids Blade Runner
Rebel androids Galactica
Rebel Androids Screamers
Rebel Androids Matrix
Rebel Androids.....

Skynet and the terminators! (I'm sure there's a band out there somewhere with that name...)

Lord of the Rings Wraith
Divine Shadow Lexx
Anubis Stargate

I don't know what a Divine Shadow is, not having seen much of the series, but from what I did see, Kai seemed Nazgul-like.

Here's another group you could put Kai into, at least if his skin were darker and he were less skinny:
Worf (Star Trek: TNG & DS9)
Teal'c (Stargate)
Chewbacca? (Star Wars)
Tyr Anasazi (StarAndromeda)

[schlaugh]

Starwars C3PO
Robot Maria Metropolis.
....

I just saw an interview with George Lucas who said he was influenced by the robot Maria when creating C3PO. He was responding to the question "Did you model C3PO after the robot in Forbidden Planet?" So maybe yet another linkage to the robot list?

[Roy Batty]

Rebel androids Blade Runner
Rebel androids Galactica
Rebel Androids Screamers
Rebel Androids Matrix
Rebel Androids.....

Rebel Androids: Space Above and Beyond