Not entirely accurate. He is married, but his wife Mera as it turns out was already married when she married him and just didn't say anything about that. She was married against her will to a man chosen by her father. This is actually pretty in character for Mera who has a long history of keeping secrets from Arthur (like how she was sent to kill him by her father).
Ohh and DC didn't take too kindly to Batwoman's writer airing his dirty laundry in public so to speak, so he is being replaced on the title as of issue #25 now. That said they have got a pretty good new writer to take the reins though for the life of me I can't remember his name right now. Apparently the overriding reason for not allowing Kate and Maggie to get married is that none of the Bat Family are allowed to have happy personal lives because that's not what they are about. Which is total bollocks really, but that's DiDio reasoning for you.
I got issue #1 of the Forever Evil event though which is very good (Geoff Johns rarely disappoints) and was full of some shocking moments, not least Lex Luthor's summary of what was going on as "Now this is a job for Superman... so where the hell is he?"
If true then this is a damn near perfect piece of casting!