The ride currently open is Millennium Falcon: Smugler's Run. This is a motion simulator ride in which a crew of up to 6 guests fly the Millenium Falcon on a mission.

The ride scheduled to open in December is Star Wars: Rise of the Resistance. Not everything has been revealed about this one as far as I can tell but it is described as putting the guest into the middle of a battle between the First Order and the Resistance. A trailer was released recently and can be found online quite easily. It looks good though!

I haven't seen Galaxy's Edge yet, we're hoping to end a 3 year absence from WDW next year with an April/May visit, so let us know what you think!