That little clip is just part of a larger teaser that essentially said the new ride is going to multiple destinations.

http://www.youtube.com/watch?v=VliPqCf4Z0w&feature=channel_page

The podracing thing is just one of the parts of the new version, some of the rumors have said it offers at least 25 different openings, middles and endings shuffled around to be different on each ride.

Only thing I'm dissapointed in regards to D23 is no word on whether they're finally going to make the Imagination ride at Epcot not suck anymore.