Well it was a fun, brief ride but Toonami airing a half-hour early at 11:30 pm (Eastern Time) is ending on October 1st. They announced the move itself on their Facebook page. The reason is because Cartoon Network is slashing an hour of Adult Swim programming which usually airs at 8 pm (ET). There's a slight chance the adult animation block could regain the time slots in January, given the move seems probably just to push holiday-related material down our throats (or worse live-action movies).
The good news at the very least is the program which is filling the slot, Dragon Ball Z Kai, is almost near its end (then again there's always Dragon Ball Super on the possible horizon). So really, it isn't much of a loss, nor is this as brutal as last year, when an entire hour was removed from Toonami. So we still got two and a half hours of glorious animated action.