Just to make sure that everybody is aware. The essence of your future canon game should be exactly that. It must be a game that will change future gameplay (like DOOM) or will be incredibly popular - launching a range of sequels (like MYST, SIMS or Resident Evil).


Your argument must explain and demonstrate the clear difference between the game you choose and other games that have come before. SO, for example, my argument around Assassins Creed would centre on the introduction of free-running movement in a game. It would mention the use of maps in a non-contemporary environment to re-create the cityscape used in the game.


Games that already exist in many generations (eg Street fighter) and are already canon games are not really suitable to choose...unless the new version of the game has a new, radical approach, that will change how things are then done.