Little expectations of this. Crossover games tend to suck. I put alot of hope into ACE:R and that failed too. Game is going to sell on fanbase, and fanbase only.
Well it sold amazing here and that was the main point. As long as it features current and all famous Jump mangas then it`ll do well.
Of course it will do well. :/.... Doesn't take a good game to sell well, as long as it is cloaked by a well-loved franchise. They could have put Naruto as the main character in Last Rebellion, and it would have sold like hotcakes, or Goku in LAIR.