I didn't find anything related to this in other topics, so here it is. While it's not officially stated, I sort of consider this new game somewhat of sequel to Jump Super Stars and Jump Ultimate Stars for the Nintendo DS. I'm a bit of the fan of the series too, but I suppose they are being developed by different companies. Namco is developing this new one. The transition from 2D to 3D graphics for the PS3 and Vita seems a bit odd to me, but it's still pretty interesting to see how it turns out.
But anyway, as it is for those are interested in anime and manga stuff... The games are basically a crossover fighting/brawl game from most of the popular Shonen Jump manga such as DBZ, Naruto, Bleach, One piece, etc. Only other thing like the previous games is that it might not be localized, so importing it might be the only option for those interested.