Here's a new trailer for Mario Kart 7, a different one than what was shown at the 3DS conference last night. Nintendo has also dropped some new information regarding how the game will take advantage of the 3DS's hardware, as well as mentioned some fresh additions to the popular series:
[Mario Kart 7] will include a new optional first-person driving mode that is controlled using the gyro sensor. The game also introduces new playable characters like Lakitu and Metal Mario, and a tricks system like the one in Mario Kart Wii.
Isn't Metal Mario a little too heavy to be riding around in a go kart? Jokes aside, these are some welcomed additions to upcoming title, which Nintendo plans to release December 4th of this year.