I’d be disappointed to see Audi branding on the cam covers of a VW F1 engine.
To respond to aracer, while there’s history with Audi and Grand Prix (but not Formula One, remember), the success and nostalgia bar would be set very high indeed…plus, I’m not mad keen on Audi as a brand.
Lamborghini and Porsche respectively have more recent F1 experience, the latter being a bit of a damp squib back in 1991 with Footwork, nee Arrows. Lamborghini very nearly bagged a partnership with McLaren at the tail end of 1993, but Ron Dennis was lured away by a deal with Peugeot…
If they wish to showcase their hybrid technology, then it would make sense for VW branding on the cam covers.