I would say that nothing is written in stone from now on for all releases. Expect that Disney will push more to D+ in the future whether via Premier Access or for free, Chapek has telegraphed this with saying the "genie is out of the bottle". This is the new paradigm for all studios moving forward.Shang-Chi is going into the theaters only for now. This might not change however Disney said the same thing about Black Widow and they obviously saw that it was not financially viable to only put it in the theaters at this time. Nothing is written in stone during this pandemic.