This discussion may contain spoilers!
First off, I'm not sure what spoiler to cover this thread with, I'm just gonna say this involves the Teaser Trailer. So if I chose the wrong Spoiler, please someone tell me. Also, sorry if old.
Second, let's take a closer look at that Trailer:
At seconds 32-34, is that Christa who walks by? It's the same purple and white jacket. I'm not sure if it's just character recycling, but that seems more silly than this idea since it's a huge character.