Word around the company is that Finn Balor is being called up to the main roster earlier than expected due to all the injured superstars and lack of star power. He is rumored to enter the Royal Rumble and potentially win it there, beginning a feud with AJ Styles who is also rumored to be in the match.
As for his NXT Championship, there are no talks about having him drop the title as of yet. It should be noted that if he keeps his NXT Championship AND wins the WWE World Heavyweight Championship, he would be the first person in WWE history to hold both titles at the same time, much like when Paige won the Divas Championship off AJ Lee.