It looks like the teaser is taken from a scene where Ichigo has just finished defeating a Hollow, as a large claw can be seen falling to the ground, seemingly severed from the rest of the monster. Check out the trailer above.
It's unclear how much of the existing Bleach material the live-action movie will cover and, given that the anime encompasses over 300 episodes and the manga was published across 15 years, there's plenty to work with. The teaser suggests at least some of it will take place in Karakura Town, where both the manga and anime also began.
The Bleach movie is expected to be released in Japan next year.