When they design these cars, they start at the front end and all goes well. Getting to the middle design of the car, all is still well but when they get to the back end, they seem to lose interest in the car and someone else finishes the car in a rush and everything gets messed up.
If an unrelated consultancy company bought the Bertone name purely so they had some sort of cachet they could market with the stuff they were making anyway (which they straight up admitted they were doing), with which they could then licence out to whatever company wants to launch a vaporware supercar, it's unlikely they care about bringing an anonymous Batmobile to a video game even if they had the rights to the design (which Akka probably don't since the company was parted out so throughly). Even bringing it up to them would be like asking someone at Lancia in 2011 what the design inspiration was behind the new Thema and Flavia.
Especially since the brand that Akka bought was actually relaunched in November of 2017 (with no word of the Vision GT since then); and the other Bertone that make trains and stuff has been around since they licenced the name before the original actually was broken up (also with no word of the Vision GT).
Even if Akka does have the rights to the unused Bertone designs like the VGT and didn't just buy the name so people would pay more attention to their own designs (like they said they did), the unrelated company they licenced the Bertone name out to slap on an unrelated car certainly don't.