HBO recently release 3 new promotion videos to tease True Blood Season 5. They don't provide any footage from the new season, but may provide hints of what to expect: "You can't escape your past. Catch Season 5 of 'True Blood' this summer."
True Blood Season 5 is currently filming and is expected to premiere this June. Like the past seasons, 12 episodes are planned. This season will deal with supernatural elements and will also focus on the Vampire Authority.