I don’t think there will be an announcement at Jump Festa; *Bleach* won’t have a "Red Stage," which is the venue used for announcements of this kind. Besides, it doesn’t even appear on the poster...
As has been stated many times, Jump will never move *Kagurabachi* elsewhere unless the situation becomes truly, *truly* serious.
Moreover, a monthly release schedule would make the story even slower and more disjointed than it already is.