TiMi Studio Group uploaded an image on Twitter on November 8, announcing that it was currently working on a new Monster Hunter title.
— TiMi Studio Group (@timistudios) November 8, 2022
The original tweet did not share any further information, but considering TiMi Studio Group is specialized and world-famous for its mobile games, it's safe to guess that the new Monster Hunter game will be launched on mobile platforms.
A later announcement made by TiMi on its website stated that "TiMi Studio Group (TiMi) and Capcom Co., Ltd. (Capcom) are joining forces on a new mobile game for the iconic Monster Hunter series. The in-development game will reproduce the hunting actions that define the Monster Hunter series, and offers players a new game experience unique for mobile devices and phones".
Source: Twitter