According to this, a 1500 HP, 280 mph monster is on the way that's over 400 lbs lighter than the Super Sport.

Oh yeah, more than $7 million if you want one. Wow...

 

http://www.carbuzz.com/news/2013/6/23/Grand-Finale-1500HP-Bugatti-Veyron-is-Coming-7714947/