Matt Burnett tweeted on Thursday that Summer of Steven is "coming soon" and he said that it will be a "mega event".
It's good to hear that Summer of Steven will be coming soon! I think "soon" means either late June or early July (as I see nothing for Steven Universe on June 9th and June 16th, you can look at the Cartoon June 2016 schedule on Toonzone, it's currently incomplete and there's nothing on SU yet, other than Hit the Diamond, which aired on Thursday, June 2nd, so, I think we should be getting Summer of Steven on either June 23rd or June 30th or July 7th or July 14th).
I can't wait for Summer of Steven!
You can view the tweet here!