SPOILER WARNING: If you haven’t made it through the complete second season of HBO’s insanely popular series “True Blood”, you might want to stop reading right here. The poster lurking below this spiffy expanse of text reveals a few things about the storyline that you may not want to know just yet. For the rest of you, however, the poster is a pretty effective teaser for what lies ahead. “True Blood” will begin its blood-soaked third season on June 13th. I strongly suggest clearing your calendar as soon as possible.