Tim might not be selling well with the rebooted new 52 origin but it's easy to see from these responses Tim inspires a lot of passion. Maybe instead of muddying the waters further, just get him a good writer to capture the feel of old Tim and let the fans use the stories they want for his origin. I doubt not referring to the messy issues that happened at the start of the relaunch would hamper the comics very much.
With DC reprinting all of Chuck Dixons Bat family work now it's pretty easy for new fans to see what all the fuss was about back then.