This long Revzilla article describes the history of the Royal Enfield Bullet 500, which will be finally discontinued this year. The ones already in the U.S. are likely the last new ones we will ever see here. Attached is a photo of the 500 Classic that is still at the shop where I purchased my KTM 390 Duke. It has been in their showroom for at least the past three months with no takers:
Current motorcycle collection: 2002 Yamaha FZ1; 2020 KTM 390 Duke; 2011 Royal Enfield Bullet 500; 2009 BMW F650GS; 2016 BMW R1200RS; 2018 Zero S 16.6 kWh