"It has been uncovered that The Pokémon Company has recently filed for two trademarks in the United States. These trademarks are for the titles Pokkén Fighters and Pokkén Tournament. It is currently unknown to what these trademarks pertain, but they could be anything from a line of merchandise to a new game, possibly the one shown at the Pokémon Game Show."
the crosover has nothing to do with pokemon - it's a solitire and horse raiding cross as for the name it sounds like the picture was indeed of a new game - hmm maybe pokemon battle revolution wiiU? I hope that it's not just another battle simulator in 3d and that it has a collo and xd like rpg mode
That crossover is called Soliti Horse. Pokkén Fighters is obviously Pokémon-related.
It looks like it's the game we saw a teaser of. The name along with the two Pokémon shown so far make me think it's going to be a fighting game, but I think a console battler like Stadium and Battle Revolution is still a possibility.
If it is a fighting game, though, we're probably going to get a very limited selection of playable Pokémon. I think this could just be a selection of (mostly) Fighting-types. I doubt it's a coincidence that both Pokémon have Mega Evolutions, though, so maybe that'll be an important mechanic in the game. If it is, the playable characters might just be all Pokémon with Mega Evolutions.