It hurts Cena long term as much as it does Brock. Cena overcomes the odds, that is his schtick. If he faces Brock again what odds are there to overcome? He already won the damn match. When Hogan needed time off in the early 90's he got attacked by Earthquake and earthquake destroyed him. Hogan got wheeled out on a stretcher, kids and women in tears the whole 9 yards. WWE ran an angle where Hogan had lost his edge and even had fans write letters of encouragemant to him. Meanwhile Earthquake is now the guy who took out Hogan and gets heat all over the country. Hogan comes back a few months later, gets revenge, and becomes the "immortal" hulk hogan. Hulk finally had to face real adversity and overcome. What if Hulk gets squashed, hulks up, and beats 'quake with no time off? Absolutely fucking nothing. Same old boring Hogan bullshit. Instead he became a bigger hero while taking Earthquake to a level he never would have gotten to on his own. That is proper booking, that is how you generate interest and make money. Most of all that is how you build a heel, you have him desroy the guys who sell tickets and merchandise. WWE has no fucking clue how to build a heel.