I know for certain they will never produce another non-Godzilla kaijuu eiga. Ever.
Their last effort, Yamato Takeru, was a box office failure.
Not counting the Heisei Mothra trilogy, that is. Those fared no better.
Toho no longer has any imagination. They can't do anything beyond Godzilla anymore, let alone any more Godzilla movies! Tanaka, Honda, Tsuburaya and the rest are long gone. They're more interested in one-upping Hollywood movies, but with as little money as possible. (Cost is why they don't like doing tokusatsu eiga much, not to mention being haunted by the legacy of Eiji Tsuburaya.)
I guess tokusatsu kaijuu eiga is better left to other companies...