Exorcism in progress?  Sign me up!  ;D  If said exorcism is done before the Ivy fight, I can throw M'gann at him but I wouldn't expect anything beyond them just taking care of the problem in question.  Artemis though is another story, but I need to be careful since she's only been in Gotham since 2014 around Christmas.  Beyond that though and a few other possible dates that might be in conflict, she should be free for the rest of the year until the Ivy fight obviously.