Premieres sometime in 2025. The new PV is here. Check out the ANN article for additional information. Synopsis from AniList:

Sequel to the film Seishun Buta Yarou wa Randoseru Girl no Yume wo Minai.

IS THE REAL MINISKIRT SANTA IN A SEA OF FAKES?

Sakuta thought he’d already accomplished step one: Find Touko Kirishima. The next step was convincing her to help protect Mai, but that proved easier said than done. In the process, however, he makes a confusing discovery: There are multiple Touko Kirishimas! The Touko he knows may not actually be the person he’s looking for! With clues from his friends’ prophetic dreams, he gets closer to figuring out exactly what danger awaits Mai, but he’ll have to sort through the fake Kirishimas and determine who’s the real deal before it’s too late…