https://www.newsarama.com/38432-25-d...-proposal.html
The prelude to which can be seen in DC Nation#0
In a Batman story by Tom King and artist Clay Mann, The Joker gets word about the wedding between the Bat and the Cat, and he’s not happy. With the wedding story arc reaching its climax in BATMAN #50 on sale July 4, The Joker will be that one wedding guest most likely to speak now and not hold his peace at all.