Nothing I've read suggests that RE corporate has even suggested the answer to "IF", let alone "when". The indian moto press seems to always predict far too optimistically.
But, it is perhaps salient that a CUSTOM that allegedly started life as a Super Meteor, was shown at Sturgis a few weeks ago.
https://www.topspeed.com/royal-enfield-super-meteor-custom-roland-sands-design/Still, it's hard to think that reactions to this very chopperish looking machine represent a very good measure of potential sales of Super Meteor 650s.
My take is that most of the competition for a small by US standards cruiser, was withdrawn from the market, years ago. At one point we were being offered:
Yamaha XVS650
Suzuki S40 aka LS650
Honda VT600C
Kawasaki Vulcan VN750
multiple models of Shadow 750, both chain and shaft drive.
Now, only the Kawasaki Vulcan S 650 and two Honda Shadow 750s remain from the big 4, although if one pushes the class limit up to 999cc, the Yamaha Bolt and Suzuki C50 fall into the category. I could list lots of other, larger cruisers that have been discontinued.
My point would be, if the big 4 feel like cruiser days are over in the US, maybe RE doesn't think it's worth going through the NHTSA certification process.