Not sure they would think of anyone to replace him just yet.
Save the next major push for Roman Reigns at the next Mania, could easily make Brock the champ at Summerslam, have him go through all the guys on my list who have never faced him (Sheamus, Orton, Del Rio maybe, Batista at Rumble perhaps, maybe even Survivor Series) and he is the elusive champ you only see once in a while, who shows up to face the challenger and goes back to his isolation like the final boss in the video game.
Save the next major push for Roman Reigns at the next Mania, could easily make Brock the champ at Summerslam, have him go through all the guys on my list who have never faced him (Sheamus, Orton, Del Rio maybe, Batista at Rumble perhaps, maybe even Survivor Series) and he is the elusive champ you only see once in a while, who shows up to face the challenger and goes back to his isolation like the final boss in the video game.