Huh, shit in All Japan's going kinda crazy - the new owner Shirashi had a big falling out with Mutoh, who is now leaving the company to form his own promotion. He'll be taking KAI, Seiya Sanada, Kaz Hayashi & Shuji Kondo with him, as well as the ring announcer and a couple of referees. The current Triple Crown champ Suwama turned Mutoh down, so he will stay with All Japan, while Taiyo Kea will return to the company after a leave of absence. Shirashi has been a controversial figure since taking over, interjecting himself in shows, raising the ire of All Japan fans and provoking New Japan in the press by insulting Riki Choshu and criticising their brand of 'fixed' wrestling. He wants to do less of the choreographed stuff and more hard-hitting, strong style & shootstyle influenced wrestling.
As for Mutoh starting a new promotion, that is really not what wrestling in Japan needs right now. It has been speculated that if he can't start a promotion, he'll form a dojo instead where he trains students and represents freelance wrestlers, much like Kensuke Sasaki currently does with his Diamond Ring school. If a deal could be struck to bring Mutoh and the other guys leaving with him to New Japan, that would be potentially huge - Hayashi & Kondo would be the perfect shot in the arm for NJPW's ailing Jr's division, while Sanada & KAI (especially KAI, coming off a huge Champion Carnival) would be good additions to the heavyweight roster.