No, it is not remix of prevous american movies.
Yes, they used many things from other plots, excluding sci-fi novels for teens, hmm like a "Guest from the future" by Kir Bulichov.
This is not serious sci-fi like "Salyut-7".
Anyway, "Invasion" smells like a real war.
Russians have a ability to made their action movies with feeling it is a real war, not just a movie war.
"Invasion" is like a videogame.
