Every bike will be changed, none will really go. As it is, and always will be.
I'm calling it:
"Streetster 1000".
Street with a 1000cc, to take over sportster. With variants of.
I cant see long term two "entry level" platforms.
Street cheaper to make. Can have 3 engine sizes, 500, 750 and 1000cc.
If they combine Dyna and Softail, Im sure they will combine Street and Sportster.
This will be HD 2018's big announcement.