Reigns is another Rock, Hogan, Cena. He doesn't need revenge as a justification. He just came in and "did the right thing".
It did set up a possible feud between Reigns and Show (which wouldn't be bad, considering it would give Reigns a big competitor who he would no doubt go over). I still think they pop Rusev against Reigns (at least that would be fresh and entertaining), but we'll see where they go with it.
wk