Here is an actual trailer.
This is another one that centers on White Rock Shooter, your main nemesis. It also promotes the White Premium Edition that comes with the WRS Figma figure.
And lastly, a super-short teaser movie.
Black*Rock Shooter: The Game for PSP releases in Japan on August 25th.
Undertale November 29 • 9:00am PST/12:00pm EST
Bloodborne: The Old Hunters December 6 • 9:00am PST/12:00pm EST