There is no denying that Sony wants to try to captialize on this type of gameplay indeed. Afterall, look how succesful the Smash Bros serie is. It is no different than people trying to capitalize on making modern shooters, seeing how popular Call of Duty is. So it is understandable in my opinion.
Smash Bros was unique when it first came out, but it is not one of a kind anymore though. There are many similar games like it now. Digimon Rumble Arena, Turtles Smash-Up, Jump Superstar and DreamMix TV World Fighters, just to mention some examples, are games that have the same type of gameplay as Smash Bros.