Well, I am going to start a community answer. Anyone have any ideas??
I was thinking that the movies all have some sort of abbreviation in the title, and then the letters could be used in the final answer. With the clues referencing space, and the ET answer, it seems that all of the movies can be space based. Might be a route to go down.
Where did the animated little guy and his family come from?
Possibly the Secret of N.I.M.H.
What type was 2 less than the first 23rd?
V for Vendetta (the 23rd letter of the alphabet is W. Take away two legs of the W, and you get a V)
Who was the botanist that shook the earth with his finger?
E.T. The Extra Terrestial (he was a botanist and his finger was magical)
TECHNICOLOR! without the earth or the obviousness.
Maybe 2001: A Space Odyssey <-- the clue, but not the theme above. Not sure if the theme is correct, so leaving here. Thanks to @JGibbers
The aliens are almost extinct.
Titan A.E. (In this movie, humans have become the aliens, and are nearly extinct)
Hey you, hand, lose the glasses!
2 more and then...