I think Anthem are really doing nothing to help themselves in this scenario.
First off, they are coming off as the petty assholes that are trying to keep Hardy from using his own gimmick. Yes, Anthem employees helped develop the gimmick. But hey, just like Hardy didn't copyright it, neither did anyone else! That's why we have this drawn out battle. Whatever way you look at it, Matt is coming across as the reasonable party, while Anthem is like "NO. NOT UNLESS YOU GIVE US JEFF'S ART AND MUSIC MONEY TOO!" That is just ridiculous and childish. I knew Jarrett was a douche, but this is above and beyond.
Second, The Hardys are still massively over without the full on Broken Gimmick. The WWE crowds are making it about the gimmick though, creating more buzz and discussion about The Hardys! The longer this draws out, the more people will get behind Matt. We all know what the wrestling crowds are like. Does Anthem really want people to start showing up at WWE shows with "Fuck That Owl" and other anti-GFW signs? I seriously doubt WWE will be confiscating anything unless it has actual swearing ... and they certainly won't try to mute anti-GFW chants.
The funny thing is, the horrendous state that Impact is in right now, they are desperate for cash. Eventually, Matt and possibly WWE, will just offer an amount that Impact can't refuse. But again, the longer that Anthem makes this draw out, the bigger it will hit when Matt DOES win.
WWE would probably have pulled the trigger on day one if they'd had the rights immediately. This slow burn that is being forced is EXACTLY the kind of thing that makes an angle great. Anthem are unwittingly making the 2nd Rise of Broken Matt Hardy into something that will be EPIC.
Eh, I've gone beyond seeing Anthem as the petty party. The Hardys basically came in and used them as a way to regenerate their careers by doing expensive segments to get themselves over and leave. You can't blame Matt and Jeff for going back to greener pastures, but how petty is that? They basically took TNA's money to create bullshit that turned into nothing tangible for them and have now left. If there is dispute over who owns it, why not try to squeeze royalties out of it? I wouldn't be asking for money off Jeff's art, but all Hardys merchandise within the realm of the campy bullshit character, absolutely. If I went on a sketch show of some comedian and created a character that was pretty funny, but then I got plucked to do another show, I wouldn't blame the producers of that show for trying to retain it as intellectual property. They're not trying to tell Matt and Jeff they can't earn a living by being themselves -- it's just the gimmick that they flew under their banner and now want to abscond.
Matt has never, ever, EVER come off as the mature or reasonable party in his life. He's airing the legal ongoings in public forums and his wife is sharing stories about Jeff Jarrett being drunk. Totally classless stuff because they feel they are getting bogged down in the red tape of the wrestling world. And they are. Because Anthem have a case and should probably try to milk money out of WWE to stay alive and keep paying their talent, etc. God knows those segments probably cost enough to produce.
Crowd backlash can play a part in things, but the crowd has sided with Matt Hardy before, only to be let down by him. It could be a case of "fool me once." Also, I don't think it's caught on as much as you think. Yes, crowds do the "Delete" thing, but they also chant "You deserve it" when Zack Ryder or Naomi win a belt. They're easily led today by anything even remotely trendy, but not all of them can appreciate the full scope of the story, because hardly anybody fucking watched it. More people saw Bo Dallas and Curtis Axel win awards on RAW than have ever seen a Broken Hardy skit. The popularity of these things are overblown. And when the crowd get it, because they will eventually pay money or agree to splitting royalties, it's going to bomb fucking hard, because it's lame as fuck.