My best wishes first, Sanjay. Indeed a novel and at the same time, must say, a very brave idea as well.
I don't know whether i am qualifed enough to suggest but I feel you first need to zero-in on a subject. A movie on Surajmal will be very different from Sir Chhoturam, two different genre for that matter.
Then, to encapsulate the entire life of a character could be very cumbersome and vague. What you can do is: take an important part of the life/lives of the great man/men and try and narrate it -- smthing like we have in Shyam Benegal's the
Making of Mahatma or for that matter in '
300'.
Back your idea with a fantastic, tight, without-any-loose-ends script with powerful dialogues and then while materialising it on the screen, let loose you imagination for you can afford it in animation movies (maybe i.e. why I would like to see an animation movie on a worrior than a social reformer as we can make our central character truly larger than life in animation movies but that is my personal bias).
Then comes the production part about which I hardly have an idea. But the key would be to conceptulise things fairly well and stick to it.
And plz plz don't let approach be parochial and think of making a film for the members of just one community. You should go with a mindset that you will make a flick that will appeal to a cross section of people.
Lastly, as Leonidas tells Dilios: "
You've a grand tale to tell" .
Good luck!