Didn't we have enough topics on this? They just quoted the one report we know for months. And as we know from the interview with the original author of this claim: The most sites misunderstood his article, it was all about that Camaro will not go to Alpha 2 and this could cause a pause until a decision for the next platform is made since e.g. VSS-R will not be ready until 2025.
Everything we know
is written down here, everything else is just speculation.
Concidering how big the hype for the new C8 is I can totally understand why GM is keeping their mouth shut and let customers of higher equipped Camaro models concider if they can upgrade to the base C8.