Bad News, Everybody.
It was announced earlier in July that SU would return to new regular weekly episodes starting this Thursday (August 6th), which went as far as episodes being listed on Zap2It and other sources. Last Friday the Crewniverse announced that plans had changed and the show will not return until September. So the SU summer hiatus continues until further notice.
On the plus side Wander Over Yonder returned tonight with Season 2, along with a fresh episode of Gravity Falls.