Adult Swim has gotten it to the point where Toonami can come back, but we're not 100% guaranteed to have Toonami back. Why? Because the executives don't think Toonami will succeed. The "Toonami" thing this Saturday May 26th is just an experiment to prove the execs wrong. If the experiment fails, Toonami will likely not be back. More info here (http://forum.legendsofequestria.com/index.php?topic=2295.0).
I think the #ToonamiIsBack(censored) thing Adult Swim has put up might just be a way to get more hype the same way they started the movement with having people tweet #BringBackToonami. I just don't want us all to get our hopes up only for the experiment to not get enough ratings, and all of us to be let down.
The experiment's long over, we've proven that Toonami will be successful and thus gotten it back.