Ideas - Peter Pan
Peter Pan is full of ideas for D&D. First the whole never grow up and Lost Boys is so much like a religion that the first power of the priest would be to never age mentally or physically. (This power is already in for the physical) Fly is another obvious power, but that is not normal for Priests Then you notice, Pan is never surprised. When ever Hook is about to strike, either Wendy or Smee shout out "Peter" or "Captain" and Peter moves out of the way. So a cool power would be to never be surprised, with a random combatant on either side magically shouting out something to warn the priest. This is similar to some powers but I doubt it would be as fun as in the movie.
In the second movie, Return to Never Land, there is a point where Tinkerbell is dying (Light going Out) because Jane does not believe in Fairies. While it would be very hard to work this into D&D, it does lend itself to the idea that Tinkerbell could be a God like character as Gods in D&D get their powers from believers and there are spells that also get the powers from the number and strength of the worshipers.
As part of my, everything has been done before, Stargate SG1 also has done this with their God like beings who kill anyone who does not believe.