I'd rather want to watch Roman Reigns vs The Undertaker, but WWE has already come to the conlcusion of a Brock Lesnar vs The Undertaker match for Wrestlemania 30.
WWE is all about money. WWE has brought back numerous amount of part timers to gain insane amount of buyrates for paper views and draws for Wrestlemania season. Brock Lesnar is one of the biggest part time stars the company has at the moment. They will be looking to book him against The Undertaker in a match that has been expected to happen ever since their 2010 UFC encounter.
As for Roman Reigns, WWE has already come to the conclusion of either having him face Dean Ambrose and Seth Rollins for the United States Championship or having a one on one match with Triple H. This all depends on the position WWE chooses to put Daniel Bryan in. They do not want two Triple Threat Matches for Wrestlemania 30. In conclusion, if Bryan faces Triple H, Roman Reigns will face The Shield. If Bryan is put into the WWE Championship scenario, Roman Reigns will face Triple H.
Option 1:
1. Daniel Bryan vs Batista vs Randy Orton - WWE World Heavyweight Championship
2. Roman Reigns vs Triple H
3. Brock Lesnar vs The Undertaker
Option 2:
1. Batista vs Randy Orton - WWE World Heavyweight Championship
2. Daniel Bryan vs Triple H
3. Roman Reigns vs Dean Ambrose vs Seth Rollins - United States Championship
4. Brock Lesnar vs The Undertaker