Currently Online 
By unannounced, I mean those without release windows as well.
FFXVII
First we have FFXVII. Nobody knows what it might be like, but after the commercial sales of FFXVI, FF will likely once again pivot.
FFVII R Part 3.
Technically announced, but there isn't any information. It will finish the FFVII remake trilogy.
Persona 6
2026 will make 10 years since the last mainline Persona game. After the success of Persona 5, ATLUS just couldn't move on and created many spinoffs.
Dragon Quest XII
Also announced, but once again very little information. Dragon Quest XI followed the ATLUS strategy with many ports and special editions, making it one of their greatest sales successes.
Kingdom Hearts 4
After the first Kingdom Hearts Saga concluded with Kingdom Hearts 3. Many are wondering where SE will go with Kingdom Hearts 4.
Tales of
Tales of Arise released in 2021 and already sold over 3m copies. So surely there is another Tales game in the works.
Yakuza: Like a Dragon
After the success of the first JRPG like Yakuza, Sega created a sequel called Infinite Wealth. The story must go on, so there is likely a sequel coming.
Xenoblade Chronicles
The last mainline game was 3 years ago. Surely there is a big game planned for Switch 2.
Other
Any others I am missing? Please comment down below
