#3 Strowman interferes and the match is called off
Braun Strowman was scheduled to take on Brock Lesnar at the Royal Rumble for the Universal Championship until this last week's Raw. As you already witnessed, Strowman is out of his Universal Championship match at RR. Therefore, he will no longer be a part of the match.
However, this decision of pulling Strowman out of the match might be taken due to him not getting hundred percent clear in time for Royal Rumble. So, if he can't fight Lesnar at the Rumble then he could interfere in their match just by throwing some punches, eventually making Balor vs Lesnar end in a DQ.
New Champs in WWE! More RIGHT HERE
This way Strowman can book his place in a future Universal Title match. As Lesnar is rumored to face Rollins at WM 35, therefore, he could face Strowman in a one-on-one match at Elimination Chamber.