That Huckfelsdt's CGI is a pure speculation. The car is PSed current 7er (look at the pic below: shadows, reflections are the same) with elements of 3er (front) and 5er (profile and back).

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It's just too early to picture a new 7er's design.
Btw, Huckfeldt's initial PS are often wrong. Look at this picture of E90 3er he published in AutoBild few years ago:
