We knew Brock/Roman was always happening but i'm generally not interested in that at all. Cena/Taker is just years past when it should have happened aswell so would need something super awesome to get me interested in this.Right now, the two top matches for Mania are scheduled as Lesnar vs. Reigns and Cena vs. Undertaker. So unless Undertaker changes his mind, and given how hard they promoted him for the 25th Raw and his being backstage at TV in Birmingham on 1/9, it makes that seem unlikely, one would expect the angle for Cena vs. Undertaker to be shot in two weeks on the 25th Raw.
Here's to hoping for a fire undercard..