Id like to see a game where you are say a flea and you try to attack household pets and draw blood vs online friends trying to do the same thing and get laid and lay eggs, win the most off spring, win the game, much to the pets/humans distress
But in photo realism (up close photo realism)
Or the life of birds an online game where you choose a type of bird and attack other birds, steal their eggs ., the species you choose has less players on your team based on how powerful the bird is, an eagle has a team of one, and so u go larking around being a bird online
the experience of a flea or a bird is quite different from a humans experience and so u may find fun in the photo realism as opposed to boredom
An underwater game where u r deep sea submarine vessels but with melee attacks and weapons, it may be better because of the unique surroundings and the comical value of making the enemy implode , but in a shoddy way with mechanical arms difficult maneuvering etc unlike with military based submarines (a sub game military wise probably hasnt been done either)
instead of COD 16, photo realistic shooting each other, with m16's and rockets, So while it may not be any of the above you get my point originality could work