Now, with the original members of The Shield all holding championship gold, their new leader, Randy Orton, will be the only one without a title.
Assuming John Cena wins the WWE Championship at WrestleMania or Extreme Rules as expected, it can be assumed that he will hold the title for several months.
Orton hasn't held a World title since September 2011, and with a new heel in Orton, it will be time for him to get back in the title picture. He could simply challenge Cena and become the No. 1 contender that way, but I personally think that Orton will win his first Money in the Bank briefcase in July at the MITB pay-per-view.
Cena will have his first strong title run starting with his defeat of the Rock, and having Orton win the briefcase with The Shield's help and then cashing in on Cena shortly after is a legitimate way to have Cena lose the title, because he'll almost definitely lose it to the MITB winner anyways, and start a feud against Orton and The Shield.
If this does happen, The Shield will officially be the dominant force of the WWE, with every member holding a title at the same time.