I know the company would probably see me saying this as a challenge, but I don't think even WWE can fuck up the return of someone who battled back from a life threatening disease.
If anything, I see this hurting someone like Seth the most in the short term. He was red hot before and during the last Shield revival, and now he's being positioned as an angry doofus getting beat up by a guy using his buddy's cancer for heat. Dean's certainly going to get the crowd in "go away heat" mode if they keep doing it, Roman might end up better for it just by not being around when all this nonsense is going down.