It's space time! #FLCL pic.twitter.com/b8pe4Yq8AT
— Schmullus (Logan) (@Schmullus1) April 1, 2018
FLCL: Alternative is scheduled to premiere in Adult Swim's Toonami block in September. The second season, FLCL: Progressive is set to premiere on June 2nd at 11:30pm.
[Source: Schmullus (link 2), IGN]