4: Letting him hang with the legend
Brock Lesnar is considered to be a legitimate threat in the WWE due to various different reasons. He is probably the only performer that found an equal amount of success in both UFC and WWE. But then again, another factor that shot him to the mainstream limelight was Undertaker’s streak. Even after almost three years, Lesnar gets heat for ending the streak and this is because of the legendary status of Taker.
No matter who steps in the ring with Taker, their career will be split into the pre-Undertaker and post-Undertaker period, and this is something that WWE could try out with Reigns. As Taker is only a performer that comes out for huge matches, a showdown with Reigns will automatically attract attention. End the match with a vague finish and Reigns will have enough gas in him to survive for a long time, or just put him over clean because Taker’s career is in its twilight right now.