The blackwing won't fit in alpha2 according to gm. So the C8's version (5.5L) certainly won't fit in the Camaro either.
There was a post here about how Mary Barra killed Z/28 development with the LT3 400 HO.
It looks real bleak for the Camaro now. 2023 isn't too far off but far enough for things to shrivel up and die sales wise if new blood isn't injected (LT5).
https://www.thedrive.com/news/28853/...-weapon-report