Sorry, if you were hoping for Onimusha. Capcom’s teaser site was for Sengoku Basara 3.
The title was first revealed at a stage show instead of the usual leaked magazine scan. No details about Sengoku Basara 3 were given and the platform(s) have not been announced. Sengoku Basara 2: Heroes came out on the PS2 and Wii. The most recent game in the series, Sengoku Basara: Battle Heroes, was for PSP.