Source: http://www.officialnintendomagazine.co.uk/29050/news/new-mario-sonic-london-2012-olympics-screenshots/

Here is the front Box art for the Wii:

The 3DS box art was not shown,  but according to the source it also has a gold box art.

So we have white, black, red and now a yellowy-goldy colour Wii boxes.  I wonder if there will be a new colour.  More importantly I'm hoping Zelda SS will come in a gold box art.

Yeah, I noticed that as well.  Banana yellow would've made a good colour for DKCR.  I used the term gold because that what ONM referred to it as and I'm guessing they got the term from an official Nintendo and/or SEGA press statement.  To avoid confusion I'll change it.

PS.  Spain held the Olympics back in 1992, 20 years is quite a short space of time between two summer olympic games in one country.  U.K and France (the two main finalists, last held Olympics back in 1948 and 1924 respectively if my memory serves me correctly.  And even in 1948, the Government was planning to give the 1948 London Olympics to the US due to rationing and funding problems, but that's another story.

PS: Those games where held in Barcelona; Madrid is the only major European capital that has never hosted the olympics. And that 20 years interval has been no problem in the past, USA had a 12 year interval and Paris had 24 years between their summer games (they've already held two), and London with 2012 will have celebrated three times in total. BTW Madrid won the second round in the bidding, but the NY votes went to London and Paris respectively. Samething happened with Rio, the US votes went directly to Rio though Madrid reached the final there. So 2020.

That's not what I would call an attractive box...