Well, it would simply fall more on the side of demos than trailers. They could still do this just it's not going to replace standard trailers. Perhaps these could be referred to as Wii U Interactions. Downloadable interactive pieces of the game that give you a little more of the game than a trailer but not quite a full blown demo either.
Hard to say if the time to create and host them would be worth it instead of going the easy route with a trailer or the more technical route and offer a full demo.
The rEVOLution is not being televised







