I would honestly just buy M2 and fit M performance goodies for way less. Not a car with a M2 badged grill, a 333i rear badge and a (stupidly expensive) M2 in the middle with some performance goodies.
The RnD costs to do something like that with modern laws and rules would be *immense*. To sell 2 or 300 units? Doesn't make business sense really.
This is a case where just "leaving it" probably was the correct move.
Ironically there is a small chance that these do somehow become valuable, the 333i badge on an M2 has to make it somewhat unique and in 25yrs US based BMW collectors might be interested to *complete* collections. But you'd need to buy and sit on it for years and years in that hope (and it'd really be a hope).
Heck, even putting different engines in from the existing lineup could have been cool.
Although I guess once again some new items needed for everything to fit together and work seamlessly.