My only issue with the time
My only issue with the time line is that it doesn't mention the release of the Demon, which was released late 2017. This addition made sense that a Redeye wouldn't be released until a year later. The Charger hasn't had a meaningful upgrade since the Hellcat was released in 2015.
If FCA isn't going to do anything meaningful for the Charger in 2020, then it's almost pointless waiting until 2021 for a Charger Hellcat Redeye. Honestly, most of the people I know personally who have been waiting for at least a Charger Redeye are tired of waiting and have begun modifying our Hellcats. No point in waiting since it's very possible that the Charger will get neglected again.