To answer 00Kevin...
1. Comic, what comic?
2. Don't know the premise of the unmade game.
3. No, except for Indy's Dad who is still up in the air. If you decide you want him, he is VERY easily worked in.
All-in-all it is an original story. About a year ago I leanred about the Spear of Destiny/Lance of Longinus and thought. Wow! That would make a great Indiana Jones story!
So, I decided to make it. It had only relatively recently come to my attention of the comic, but I decided to stick with my storyline.
Finally, 00Kevin, if you want to help create/edit the story I'd be glad to have you help.