The performance version (ie biturbo) of the new 6.3L V8 will be used by the McMerc P8 (if it gets the nod from the MB board) and the N/A version of the engine will replace today's supercharged 5.5L V8 engine.
The bi-turbo version of the engine is being worked on by Rolf Zimmermann and Bernd Rambler, Rambler was the designer of Porsche CGT's 5.0L V10 engine. Zimmermann was THE MAN that oversaw the development of the Kompressor V6 and V8 engines.

True?