I really loved this use of the mold, because other than the kibbliness it felt a lot conceptually like a lost S1 BW character. "Ultra Mammoth" has all the energy of Waspinator or Optimus Primal as a name if you set aside the existing history of those names and just look at it fresh.
And it sucks. Brave is awesome, shares A LOT of design DNA with Transformers, and I'd love Brave re-issues or even just using it to enrich the Transformers line.
But TT can't do anything with it, and Bandai only seems interested in using it as a spot filler in some of their more premium lines.
Well SOMEONE'S doing something with it:
The 10th Brave, Sworgrader's getting a manga at least. No anime though, but there'll be some sort of figure eventually I expect. It's another crossover type story ala Baan Gaan and Brave Saga, and they're actually bringing the never-made Photogrizer in as the 9th Brave as part of it(he's the silver one below Star GGG). The basic alt mode of Sworgrader's a food truck from what I recall reading.
J-Decker made it into Super Robot Wars 30 as well, though that was a year or two ago now.
Bandai's also still willing to license it out:
Upcoming Kotobuya kits: Dino Geist (12/23), Great Exkizer Gold Ver. (2/24), Great Fighbird, Da-Garn & GX Parts, Pegasus Saber, Land Bison, Seven Changer, Super Build Tiger (out now), Great Baan Gaan
And there's a couple other expensive collector lines from non-Bandai companies doing non-GGG and non-Might Gaine things:
fully transformable Evolution Toy Fighbird should be soon(unless it got delayed again) and Granbird for December, can form Great Fighbird
Metamor-Force Fire Dagwon slated for December 2023 and Power Dagwon for April 2024, both are transformable and can form Super Fire Dagwon (though the DagFire component of both is non-transfomable)
Nothing Takara lined up though.