Remember how one of the reasons they decided to give Ouendan an American makeover was because the game was doing so well they thought it would be stupid of them keep it Japan only? Well, I was thinking that this could be done with the Jump Superstar series.
The game is definitely a hit among fans, not just because it features well known manga characters. The games are almost considered to be the SSB game for the DS. The problem is that the anime stories and characters featured on the game are licensed by many companies in the US. It would be HELL to try and publish this in the US.
So I was thinking, why they don't take the original Jump superstars/Ultimate stars engin, work with Nintendo and Hal and update it to a SSB game?
They could easily replace the characters with Nintendo characters and keep the 2D gameplay intact, with the exception of updating or replacing the manga panel engine entirely (I don't quite understand how it works).
The problem I see with this is that they would also have to release the game in Japan as well and Japan had played this games two times already. Hal and Nintendo would have to make it so that its a brand new experience.
This definitely falls under wishful thinking category, but considering how popular the game is outside of Japan, they should do something with the engine.