If its a mytho - then all the stories are readily available with the timelines in place, and also with loads of the interpretations from various Gurus and also academics.
All they need to do is set the theme, and combine the stories with the interpretations.
Basically, they can have the complete storyline ready with screenplay even before they actually start shooting. Instead of bumbling about from track to track.
This will also ease the casting bit - getting the right actors for each role etc right till the end.
All they need is a good writer (so that means definitely not UN).
In fact, maybe instead of just being inspired by Mr.Patnaik, they should get him to co-write with the original writer from DKDM. So that would be a good mix of masala and academia.
Wishful thinking, I know, lekin sochne mein kya jaata hain 😃