The official Twitter account for Kenichi Sonoda's "Project [B.B]" anime posted key frames that show the logo for animation studio Passione (Rokka: Braves of the Six Flowers, Citrus) last week.
The Twitter account also announced last week that the project is a crossover between Sonoda's action works, such as Gunsmith Cats and Riding Bean. The key frames above appear to show Minnie May Hopkins from Gunsmith Cats. The staff also shared concept art for characters who appear to be Bean Bandit and Rally Vincent (with both her Riding Bean and Gunsmith Cats designs).
Chicago's Anime Central convention will premiere a preview of the project this May. Sonoda will appear at the event with animation director and producer Shuzilow.HA (Shujirou Hamakawa) and composer Marco D'Ambrosio. The creators will reveal details, including the meaning of the name "Project [B.B]," at the event.