Ending it after this arc would make the series a complete waste. They should just stop introducing new characters/bad guys that don't help to tie up any loose ends. The Sound 4 were all wastes of life and shouldn't have gotten so much time. Even Kimi who seems cool, won't help answer any questions, seems like they just had him so they could give Lee a grand entrance. I'm sure Kishimoto has some sort of game plan, and the next arc will give us closure for some of the things that we still want to know.