Both the NA and JP servers went down today about 30 minutes ago, presumably for maintenance, without warning.
Could this mean a patch, DLC, or is it possible that the servers are going down for good? There was no announcement like ACV had, as far as I'm aware, and it seems very early for them to pull them down entirely.
The JP ACVD-LINK site is also down for maintenance, but there's certain that's what happened.
Free battle is still up if you start the game in offline mode.