#2 They're still not sure who it is

This may seem strange, but there is a genuine possibility that the company still doesn't know who they have planned to be Roman Reigns' attacker. After all, it seems all the major suspects have been cleared, as Samoa Joe proved he wasn't the man behind the wheel when Reigns was run down on RAW, and Rowan and Daniel Bryan were able to admit Buddy Murphy lied about their involvement, though through some not-so-legal means.
As bad as it sounds, there is the chance that the company are stalling, as they try and put an answer together on who ran down the Big Dog. Out of all the major suspects so far, Murphy is the only one who hasn't been cleared, though we're not sure if he is ready to feud with the former Universal Champion.
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If the WWE really doesn't have an answer to the mystery, they've got a week to find one, as the company would receive major backlash if they stalled the secret of who has been attacking the former Universal Champion being revealed once again.
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