i think the reason the chances go from slim to absolutely zero are the following:
TP was easily ported to wii due to same architecture, at wii launch, cube tech wasnt too dated and thats why nintendo went that road. As a result, a benefit was that it took no time to make a cube game , a wii one, takes no cost nor effort(wii play metroid 1, 2, and ports).
To asume next wii , nintendo, to use still 2k4s architecture of cube is a bit ludicrous.If not impossible.Nintendo wont be the next gen console on a chipset as limited as cubes-wiis.It would double their production costs for one game, making it a what, a 40 million investment?see the issue.Why?they would have to restart the programming from scratch.
Therefore it would prohibitely cost too much to be doable.Basically, if you expect it, you expect next wii to use similar to wii cpu and gpu, and i think nintendo wont do this again(they stated that with 3ds, they didnt want devs to complain about lack of power as they did with wii,so they made sure it had power-iwata said it himself).Chances:0%.