Do the lyrics of Madoka Magica's two movie OPs foreshadow Rebellion's ending?
They could not be planned to foreshadow Rebelion for a very simple reason: Urobuchi (author of the story) did not plan for Rebelion when writing the series. There are actually quite a few interviews with him that bring some light to his choices about the script, and he never mentioned lyrics.
Short answer then: very unlikely.

Edit: As comments states. This does not apply to the movies' openings.