The answer to that would be- it is not
It's very unlikely as the ending of shaman king was unclear and the manga not properly finished
Shaman King, because the bad guys in Pokemon are so stupid, they practically tell you every thing they are going to do.
Probably not, since the franchise pretty much ended a few years ago.
Yoh doesn't die in the Anime. Yoh does die in the Manga, but is brought back to life.