WWE's future does indeed look very bright, providing that WWE can build these young, potentially great stars, correctly to make the fans care about them in the same way fans have been made to care about the stars of the past and present; Cena, Orton, Batista, Big Show, Mysterio, Edge, HBK, HHH, Undertaker, Kane, Bryan, Punk, Jericho and so on. If WWE can build the next generation of superstars to make us care about them as much as we cared about the previous generation, then WWE's future looks extremely bright.
I think The Shield trio should be three of the main stars we see on our screens for years to come. Rollins is the one that MAY be in danger of getting lost. He has a lot of characteristics that likens him to Dolph Ziggler or Kofi Kingston, in that he can put on fantastic matches with anyone, and sells extremely well, but will always be used to make others look good.
Another problem for the Shield trio is how each man will be repackaged when they split. WWE will have to come up with some sort of identity that isn't generic and makes them stand out as stars if they're to go on to become something special as individuals.