Seriously, I just saw footage of it on YouTube and thought the Wiimote and nunchuck could easily simulate the original game's maracas.
If I am not mistaken, the original maracas consisted of motion sensors, right? Well, both the Wiimote and the nunchuck has motion sensing integrated into them so its not like its impossible to emulate the gameplay of SDA on the Wii.
Plus, this would be an excellent chance for fans who never played the original to try it on the Wii. Plus, the game would be MUCH MORE cheaper (the original game set you away over 80 bucks because of the maracas and carpet), since the extra components are already available when you buy the Wii.
Also, in fear of Sonic Team messing it up, they should just take the original game plus the expansion pack, bundle them on a DVD and BE DONE WITH IT. No extra additions, no new gameplay features, no reworked graphics, NOTHING. Maybe a new song here and there, but nothing else. This guarantees that what we get is the original game intact, not a reworked version with tons of flaws (we all know what happened to Sonic Adventure on the GC).
Here are the two videos I was talking about:
Video 1Video 2Since I never played the game myself, feel free to add to the discussion.