So in the new trailer we get another look at what appears to be Empire-era Imperial Star Destroyers. Although I'm kind of wondering about the context...


1)Could be the remnants of the Old Empire deciding to help out the Resistance with what's left of their fleet against the First Order. According to some materials, an old pocket of the Empire exists that was allowed to keep it's territory.

2) Holdo's thing managed to mess up the FO fleet so bad they're using the older models.

3) Maybe a hidden fleet somehow involved with whatever Palpatine's plan is.