The statement that the current 4K masters are being "carefully checked" reminds me of the "top men" quote from Raiders.There hasn't been much info beyond speculation since 2021 is the 40th anniversary of Raiders and when the new movie was originally coming out.
There is this report, but take it with a grain of salt. I'm not sure if a new scan is needed, but they certainly need to revisit the color grade.
Is the Laser Pacific page about Raiders archived on waybackmachine? I haven't been able to locate it.