^^ True. However, I think, even though it's a long time coming, AB has been getting a fair amount of traction in the states since probably 2010. Managed to get their first #1 single on mainstream rock radio with Isolation. The Last Hero ended up on the top 10 on the Billboard 200 (their first time on the top 10 on Billboard 200 since One Day Remains). Have reached a stage where they should have no problems having 1,500 people or more per show in North America. They still have a dedicated fanbase where certain fans have no problems spending lots of money on VIP meet-and-greets and guitar clinics.
Now, they just got to try to get more shows with the consistency of crowds they've been getting in North America, during this album period, without oversaturating themselves. They got a good start so far. I don't see a reason why it should stop. I think they can feasibly do well in areas like Vancouver, Edmonton, Calgary, Denver, Jersey, Pittsburgh, even their home base in Orlando (they only did one show in 2016 which was the listening party with a condescended set in a small crowd. The last time they did a big AB show there was at the House of Blues, the only NA show in 2013 and they pulled a big active crowd there) and the areas surrounding those.
I don't think this leg has the only headlining shows in North America for 2017. Then you read a lot of tweet responses from AB's twitter page regarding bringing them to South America and Ireland. Those guys are really frothing for an AB show, and the band has shown great interest in playing there. It just comes down to the logistics.
With, all of that stated, one of the few ways for AB to really try to attain more new fans that never heard of them is through cross-promotion with other bands. I.E, either co-headlining tours (who could co-headline with AB and pull in about 3-4,000 people?) or opening for bigger bands (like they did for Breaking Benjamin and Disturbed in amphitheaters last summer).