Pokemon Go's seems to have hit a wall with bringing fresh ideas to the game, but I think reintroducing a version with Pokemon Snap might do the trick. Instead of taking a picture of a singe, lonely, Pikachu starting at you and waiting to whack that pokéball back at you, why not lead a trainer to a place where a pack of Pikachus are taking a nap under the sun?
RE: Pokémon Snap' becomes reality in 'Pokémon Go' photo contest