The New Trailer For Pokémon Black 2 & White 2.Which was shown on Nintendo Direct,it does contain some new footage apart from what we have already seen.
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Source: http://www.serebii.net
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Pokémon Black 2 & White 2 - New Trailer
A bit less noteworthy, but a new trailer was shown for Pokémon Black 2 & White 2 during the Nintendo Direct conference. This trailer did not showcase anything new game wise, but does have a few small bits of new footage showing the movie feature as well as a couple of new areas and Shizui's Gym
Gameplay Trailer
Source: http://www.serebii.net