SciFi Japan has been updated with a translation of the story synopsis by James Ballard!

The popular TV series ULTRA GALAXY: MEGA MONSTER BATTLE will hit the big screen in Japan this year with MEGA MONSTER BATTLE: ULTRA GALAXY LEGENDS THE MOVIE (Daikaiju Batoru Urutora Ginga Densetsu THE MOVIE). The movie is directed by 38-year-old Koichi Sakamoto, who has worked predominantly as executive producer on the long-running American TV series POWER RANGERS (And not Sentai stuff).

    The story heats up when Belial breaks free from his prison, and plans to use the Giga-Battlenizer to control 100 giant monsters and conquer the galaxy, shrouding the home world of the Ultramen in a state of darkness. Set in nebula M-78 on the Star of Ultra – the home world of the Ultramen – original Ultra heroes Ultraman and Ultra Seven stand with the popular Ultraman Mebius against the devious Ultraman Belial. As the movie takes place in their homeland, the heroes are not restricted by the same 3-minute timer as they are when they visit Earth.

    Original actors Susume Kurobe and Kouji Moritsugu return to reprise their roles as Hayata (Ultraman) and Dan Moroboshi (Ultra Seven) respectively, facing off against an army of over 100 giant monsters!

A newspaper article has stated there will be FIFTY Ultramen appearing in the new film! The following 18 are confirmed:

    Ultraman
    Ultra Seven
    Ultraman Jack
    Ultraman Ace
    Ultraman Taro
    Zoffy
    Ultraman Mebius
    Ultraman Hikari
    Ultraman King
    Father of Ultra
    Mother of Ultra
    Ultraman Leo
    Astra
    Ultraman 80
    Yullian
    Ultraman Neos
    Ultra Seven 21
    Ultraman Boy

not sure if you guys know this but there's a Chinese tokusatsu: -

铠甲勇士 (Armor Hero)