Editing List of Mario Kart Wii pre-release and unused content

As seen in ''Mario Kart Wii''{{'}}s 2007 E3 trailer, the game has gone under drastic developmental changes before release. Early builds of the game heavily relied on elements from ''Mario Kart DS'' (such as a title bearing resemblance to the one found in the previous ''Mario Kart'' game), but then the designs changed and the [[POW Block|three]] [[Mega Mushroom|new]] [[Thunder Cloud|items]] were added to the item roulette in the final version. The model designs for many of the vehicles shown in the trailer, such as [[Standard Kart S]], [[Standard Kart M]], and [[Standard Kart L]] were slightly different. Interestingly, character animations were very minimal in what was shown in the trailer, where characters wouldn't even move in their vehicles when going off of a trick ramp. Though only [[Mario Circuit (Mario Kart Wii)|Mario Circuit]], [[Wii Wario's Gold Mine|Wario's Gold Mine]], [[Wii Moo Moo Meadows|Moo Moo Meadows]], [[Wii Mushroom Gorge|Mushroom Gorge]], [[Luigi Circuit (Mario Kart Wii)|Luigi Circuit]], {{classic-link|DS|Yoshi Falls}}, and {{classic-link|GCN|Peach Beach}} were shown in the video, very slight course differences were present in all of the tracks. Courses other than [[Wii Coconut Mall|Coconut Mall]] originally had rainbow [[Dash Panel]]s. Also, [[Wario]] is wearing his original long-sleeved shirt instead of his current short-sleeved one he has in the final build.