One of the major attractions for anime fans at C2E2 was the announcement that Toonami and Adult Swim would be hosting a panel on the new seasons of FLCL. Fans who attended the C2E2 panel were treated to a screening of the full first episode of FLCL season two (FLCL Progressive). The first episode of season three, FLCL Alternative, was actually shown on TV as an April Fool's joke. But as far as I know, this is the first time anyone has seen the premiere of season two ahead of its June 2 release.
via destructoid https://www.destructoid.com/i-saw-the-first-episode-of-flcl-progressive-let-s-talk-about-it-497681.phtml