The Teutuls have missed the spotlight and publicity needed for money making, and decided to get back to working together on a tv show, after all, they did have the highest ranked show ever on Discovery

“American Chopper was one of Discovery’s most popular series ever,” said Rich Ross, Group President of Discovery.

The original American Chopper premiered as a special in 2002 and ran for 10 years, airing 223 episodes before being cancelled in 2010 and then was rebooted as the spinoff American Chopper: Senior vs. Junior for another two years.

http://ew.com/tv/2017/10/18/american-chopper-revived-discovery-channel