unamochilla2 said:

I wonder if that soccer ball droid is going to become the "new" sidekick of the new characters kind of like R2 was for the OT characters (and PT characters, I guess). Or, could it simply be a short lived gag moment like Chewbecca scaring away the mouse droid on the Death Star?

I highly doubt that it will be a throwaway gag, as this trailer shows most major players in the movie. I would bet money that this is Daisy Ridley's droid, on some sort of mission at the station.