This is sort of an opinion question, and yeah, I know it goes back MONTHS.
When she had that weird thing happen as they time-traveled past 1985, one of the things that happened to her included her being with the Legion.
Now, to the best of my knowledge, neither pre- nor post-Crisis did Power Girl ever interact with a version of the Legion.
Should we assume that, despite her being depicted in a Power Girl costume at the time, she may have actually been experiencing something from the life of the pre-Crisis Supergirl? (Or was she just experiencing something from an alternate timeline where Power Girl was a LOT more similar to Supergirl than the "real" version is?)
> Now, to the best of my knowledge, neither pre- nor post-Crisis did Power Girl ever interact with a version of the Legion.
Power Girl met the LOSH in 1977's JLA #147 and #148.Scott