Lol... 250+MPH down the Mulsanne not quick enough for you Becky? Le Mans didn't want a repeat of the 1929(am i even close?) Benz killing 80+ people, and for that i don't blame them.
A ~600HP protype would be really nice. I fear a 800-1000+HP beast just wouldn't work for multi-class racing. On the other hand, if a Real damage model was introduced, and people didn't hotlap every lap, there might be a place for such a car. If you really had to balance speed vs risk, it would be a great thing.
Imagine, if you will, in the recent 24h race we had. The amount of torn fenders was ridiculous. Instead of ~25 seconds to fix anything, image if it took 25 minutes to replace those fenders... That would change how you approach the race.