Ok... I'll have to check again which Swaplander has which movement type. However, I think that spin or stealth could work (especially stealth). Maybe he could disappear into a magic mist, and become invisible, or he could be wearing a magic cape, and then wrap himself with it, and vanish. Personally, I think that spin could work better with an Earth Swaplander. Kinda un original, I know. But it woul work well. However, that bluish energy orb could be hinting to some spin move, where the Skylander spins on his own wheel, while attacking with his upper half. I don't know... I'll have to think...
UPDATE:
Ok, after watching again the trailer (for like, 12 times), taking a few photos, and watching it again on a bigger screen, I have to admit that the upper half actually looks like Magna Charge's. The lower half is also very similar to his bottom halve, except for the color of the energy ball (wich could however be an update that makes it looks different). I'm still not sure, and I will continue to investigate, but this is my tought, as of now. Let me know what do you think about it! Any help is really appreciated!