Two years after the Justice Department and a coalition of states sued Live Nation and Ticketmaster, the case that defined antitrust action in the music industry is finally entering its closing act.

Earlier this year, a federal jury found the company liable on all antitrust counts and the fight has since moved into the paperwork phase that decides whether any of it sticks. Briefing wrapped in early July, a hearing is expected soon, and behind all of it sits a Tunney Act review of the DOJ's separate settlement and an appeal that isn't going anywhere fast.

However Judge Arun Subramanian rules, the structural questions about Live Nation's dominance have now had a full airing — in front of a jury, in discovery, in the public record. That's the point at which regulators, having built the muscle and the case law for this industry, usually redirect their attention rather than declare victory and go home.

There's no reason to stop now, and there's no shortage of places to point that attention next. Some of these are old problems the Live Nation case never touched. Some are new enough that regulators are only starting to build a file. None of them are going away on their own.

Below are five slow-burning controversies in the music business and live entertainment that will soon likely draw the attention of regulators and federal law enforcement.