If Manhunt does even semi-ok on the Wii (or gets nice reviews), its quite likely. The question is - would they release ports of the old games, make a new game, make it based on the new engine (likely that the Wii couldn't handle it - with the NaturalMotion stuff running). If it does come out, its a big vote of confidence in the Wii.
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Wii code: 2263 4706 2910 1099