So theres new news out that Mercedes and Infiniti are developing ANOTHER platform together. Its expected to be a mid range platform that will underpin the next gen QX70 and ML. Considering the QX70 and QX50 already share the FM platform donated by the G37 its entirely possible we see QX50 migrate to this platform as well. The only caveat is the platform is not expected until 2017.
so maybe not...

so maybe not...