Nintendo announced today at their E3 press conference that they are developing Super Mario Galaxy 2 for the Wii.

Super Mario Galaxy 2 looks a lot like the original game but they have added a lot of new content to the game. The biggest addition to the game is that it now includes Yoshi. Another big addition is a drill tool that allows you to drill through walls.

Super Mario Galaxy 2 will be released in 2010 for the Nintendo Will. Check out the trailer after the break.