According to this Famitsu scan posted by @Lite_Agent, this new game takes place during Japan’s Meiji period (1868 - 1912, a.k.a. Rurouni Kenshin times) and naturally features a new star — it looks like that star is an ancestor of Phoenix Wright. He has a sword, too. Cool sword, new guy.
The full title, according to @CourtRecords_, is Dai Gyakuten Saiban - Naruhodou Ryuunosuke no Bouken, or Grand Turnabout Trial - The Adventures of Naruhodou Ryuunosuke. As mentioned previously, Ace Attorney creator Shu Takumi is once again heading the project, after taking a break from the series with Dual Destinies.
Sounds great, if these clips from the recording sessions are any indication! The album, due out April 23, features 19 tracks from the first three Ace Attorney games, because Capcom apparently chooses not to acknowledge the rest of them. Via Siliconera.