MMU is an HD title.
No offense, but that's a pretty narrow-minded statement. These trailers are showing gameplay clips in windows about the size of a PSP screen and even at that size you can clearly tell what's going on (hell, I *WISH* MMPU would have distanced the camera that far).
When people say that there isn't a "graphics knob" to turn down between consoles, they're referring to how the entire package (game engine, textures, models, number of objects handled during gameplay, ya-de-ya) is often too complex to be ported between systems of varying strengths and architecture; the pixel resolution you wind up with at the end of the day is a very small and easily adjusted piece of the puzzle (remember that the "HD consoles" are all backwards compatible with SD TVs).
Nothing I've seen in the trailer looks like it's taxing system demands. The graphics are, as High Max would say, "not amazing", and 2D platforming physics are 2D platforming physics. Shouldn't be much more troublesome than Sega porting Sonic4. Frankly, I wish Capcom were taking better advantage of the 360/PS3 system capabilities. I still wouldn't like being out of the loop, but at least then it'd make sense, and there would be the peace of mind that they're putting their best foot forward. I feel that their Classic/X developments ever since X8 have been on the lazy side, visually speaking.
If the Wii's system limitations are standing in the way, it's most likely WiiWare file size limits that are the problem, not system processing/resolution capabilities.
To which I curse the mentality of platformers being "not valuable enough" to appear on discs, and applaud Nintendo for "playing it safe" and doing with NSMBWii what likely every other game company in existence would have considered suicidal (you gotta love how IGN covers this stuff). That aside, I must admit, whoever thought that 512MB was enough space for a downloadable games archive needs to get ZEE UPPERCUT!!
Also on DeviantArt, Rumble, DLive.tv, and the Fediverse (@freespeechextremist.com and @bae.st)