timdiggerm said:
Seven Samurai (1954), The Magnificent Seven (1960), A Bug's Life (1998)
I haven't seen the original, but it's considered a classic. I've seen the other two, and they're both excellent, though obviously A Bug's Life is a bit different in tone.
"Bugs Life" seems more of a riff on "The Three Amigos," which is itself plainly poking a bit of fun at "Magnificent Seven."