From Anime News Network:
As with Basilisk, Funimation's upcoming Trinity Blood theatrical release will be a compilation of the first four episodes of the series, with the in-between opening & endings and the eye-catches removed; there will be a full opening and ending at the beginning and end of the movie, which will run approximately 90 minutes.
The full theater list for Trinity Blood is not yet available, however the following three National Amusement locations have been confirmed:
The Bridge Cinema De Lux, Los Angeles, CA
Showcase Cinemas Ann Arbor, Ypsilanti, MI
Showcase Cinemas Revere, Revere, MA
Trinity Blood opens on May 5.