When Revis was originally signed, the team constructed a contract that was effectively a one-year deal. It backloaded money to a second season option, so the 2014 payment was less, but the average money per year met Revis camp's demands.
The thought was that Revis would never play 2015 under the contract structure; either the option wouldn't be picked up and Revis would walk, or the Patriots would find a way to restructure to keep Revis long term and the 2015 salary cap would be amended.
The hope is that the latter will still happen. According to the NFL Network's Ian Rapoport, there's another possible option in play: the Patriots might be willing to keep Revis around for his monster 2015 contract amount.
Essentially, pencil in Revis for 2015. The Patriots pay those who deserve it and they believe that Revis is their most important player on defense. With that said, New England will make their desire known to Revis early on, so hopefully a long term deal can be struck early on so the other defensive pieces (read: Devin McCourty) will have enough cap space to go around.