According to this interview with Toonami at CNX: Toonami Revolution, when Jeff Harris of CNX asked,"Toonami Batman's a good addition to Toonami, but CN only has access to a few of the episodes. Is Toonami planning on showing the remaining Batman episodes in the fall along with Superman?" The host at Toonami responded with this, "We will definitely eventually get all of the Batman and Superman animated adventures - round about September."  This is very good news.  A big thanks to Jeff Harris of CNX: Toonami Revolution, an excellent site.