That new concept art book cover pretty much confirms the trippy lightsaber fight we’ve been hearing about where Rey and Kylo keep “force flashing” across different settings, some of which being in zero gravity and/or underwater.
Maybe. A lot of concepts that are tossed around in early development never actually make it into the film.
It is a pretty cool piece of concept art though. Hopefully they’ll do something interesting with the final lightsaber battle and keep it from being too schlocky.