Allegedly the next Gen M5 will have the S68 or a version of it. The S68 will be in multiple platforms beginning with the the X7 M60i LCI, followed by the XM, and the X5 M60i LCI. It is a mild hybrid right out of the gate.
Edit: BMW S68 Twin-Turbo V8 — An M Division Engine for the Masses:
https://www.bmwblog.com/2022/04/15/b...vision-engine/