User blog comment:Tupka217/Christopher Jones teases new comics characters/@comment-5188108-20120828160928/@comment-3094698-20120828210434

well im only saying this because dc have a history of being very pedantic with characters who have the potential to appear in several unconnected shows at the same time. example: no batman characters other than the man himself were allowed to be used in justice league due to both teen titans and the batman airing at the same time, meanwhile over on teen titans no mention of batman happened, also over on the batman they were blocked from using robin until teen titans ended which is the reason why batgirl appeared first on that show.

im only basing this on stuff dc has already done, im sure they made an exception for batman because he is their main cash cow and you cant have a justice league without him