Twitter by Ochan, who had worked on the Virtua Fighter series at Sega from 2011. His original tweet doesn’t mention what games they are currently working on. However, with some of the moves shown looking exactly like key attacks from Virtua Fighter, some were sold on a new Virtua Fighter project.
The last official news we heard from Virtua Fighter was Virtua Fighter 5: Ultimate Showdown in 2021. A game that touched up the last major release in the series faithfully, which struggled to find success among fighting game players thanks to unreliable netcode that made it difficult for people to play eachother during COVID lockdowns.