Hugh did have a good year at the domestic box office on the overall for 2006 ( $ 570 million). If you care to count the international receipts, also from the same site, his movies grossed a total of over $ 1 billion in 2006
https://www.boxofficemojo.com/people/chart/?id=hughjackman.htm I think people don't realize that VIVA LAUGHLIN is not Hugh's TV series. His role is only a cameo, albeit recurring. But it is his first venture as a TV producer, hence his major interest in the show. I think this is part of his production company's deal with CBS to produce some shows for TV. I think you can't blame CBS for using his popularity to publicize this new series
I have seen the BLACKPOOL series from the UK, which was a hit across the pond. It is not a conventional musical, rather it is a murder mystery drama involving a fairly dysfunctional family. The musical numbers ( only a few) provide comic relief and spice up the scenes. It actually involved sing-a-alongs, not lipsynching, choosing pop songs that are most suitable to the scene ( some are downright comical, believe it or not

)... I do not know if they will adopt the same serial drama format of the UK version ( it was only a 6-part series), or if they will choose a slightly different one. But it seems they have added new characters ( Hugh's role of a wealthy but sleazy casino-hotel operator, included) in the US TV version.