Getting back to the original subject of the thread, Toonami has a TON of competent competition tonight. NHL hockey featuring the Preds is on right now, and the NBA Playoff game begins on ESPN tonight at 9, and will most likely have the conclusion coincide with the finale of Samurai Jack. Plus SNL's season finale will affect everything after Jack's season finale.
I don't think there's any UFC or Boxing, but isn't that ENOUGH? Well I guess we'll see how everything does Tuesday!
Also, if there were ever a time for Dragon Ball Super to take over 11 PM, it's now (well beginning on June 3rd). We're through the embarrassingly bad Beerus-ish filler and Frieza is BACK! Even if they're reruns, I believe those episodes will likely do well on Toonami because it IS Frieza!