Elias was in the ring talking about his big successes in 2018 and then confirmed that will be in the Royal Rumble. He then started trashing on Baron Corbin and called him a joke. He was about to start singing the song he wrote for the former GM when Corbin interrupted.
Corbin claimed no one got his genius and that he wasn't going away; he was joining the Royal Rumble instead.
Elias vs. Baron Corbin

Elias dominated early on and sent Corbin out of the ring before leaping off the top rope and wiping him out. After a break, Corbin was in control and went for a pin but it was a near fall. Corbin was mad at the referee while the crowd chanted 'you got fired'. Elias hit a flying knee from the top and a swinging neck breaker for a near fall of his own.
Corbin hit the End of Days and picked up a quick victory after Elias almost ran into the referee after an Irish whip.
Result: Baron Corbin def. Elias