Image Credit: Lucasfilm
We know for a fact, thanks to the many Rogue One trailers and teasers, that there will, in fact, be some legit space and atmospheric battles between the Rebel Alliance and the Empire. And, it appears as if the X-Wings will be leading the way for the Rebellion, while the Empire will depend on its trusty TIE Fighters.
For instance, the Imperial military construction planet of Scarif is protected by a planetary shield that can only be accessed through a small shield gate. We’ve seen the X-Wings attack that shield gate in the trailers, and we know our favorite group of rebels ends up on Scarif for the final battle, so that means the X-Wings did there job.