User blog comment:BenRG/Volume 2 Opening/@comment-24435688-20140525042218

I think that you can see CRDL falling from the sky along with RWBY, JNPR, Velvet's team, Sun's team, and Penny, which to me is an indication that they do turn out to be good guys.

Just because they're fighting Pyrrha doesn't mean that they're evil, Beacon is a fighting school after all. It could just be sparring or Cardin trying to resolve his earlier vendetta with her in a more direct sort of way.