This is the weirdest news I've heard in quite a while.
Pros:
- CoD4 is one of the best first-person shooters ever made.
- If all the online features are brought over, including in-game parties and voice chat, this should be the premiere online multiplayer Wii game.
- It's another chance to refine Wii FPS controls and compare them to what is available on other platforms. (Note: Classic Controller should still be supported.)
- There could be new features, such as World at War's co-op/on-rails mode, or some new connectivity with the DS game(s).
Cons:
- It looks really bad to release this at the same time the sequel (or arguably, the sequel's sequel) is coming out on other platforms.
- Considering that CoD4 has sold a billion copies, most people who wanted to play this gave have already done it on another platform. The potential market for this port seems trivial.
- The game is being ported by a different developer. You can't really predict how well the game will turn out based on the Wii versions of CoD3 or World at War, because those were Treyarch's own games. As far as I know, this is the first time Treyarch has ported a CoD game that was originally developed by Infinity Ward, although Treyarch has been using Infinity Ward's engines for a while.
- As noted earlier in this thread, Treyarch has a history of developing inferior Wii versions (missing features).
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I'd be a lot more interested if Treyarch was developing an original Call of Duty game for Wii, or if Infinity Ward was developing a Wii version of one of their own games (preferably Modern Warfare 2).