Sega has announced that they will release Mario & Sonic at the 2012 London Olympic Games. Mario and Sonic will once again join forces on the Wii home video game system and, for the first time ever, on Nintendo 3DS as the much loved duo head to London to participate in the officially licensed Olympic-themed video game, Mario & Sonic at the London 2012 Olympic Games. A host of exciting new headline events, including Soccer and Equestrian will debut on the Wii version appearing alongside classic Olympic disciplines, such as Athletics, Aquatics and Table Tennis. The new handheld system from Nintendo will bring a whole new dimension to the Mario & Sonic universe with glasses-free 3D visuals and around 50 original Olympic themed events playable using the unique control systems of the Nintendo 3DS. Check out the debut trailer below and tell us what you think about Mario & Sonic returning to the Olympics.