A microturbine would be interesting, but does GM currently have an design experience with wankel engines? It's my impression that making a low emission wankel

A microturbine would be interesting, but does GM currently have an design experience with wankel engines? It's my impression that making a low emission wankel takes some clever engineering, you'd want a team with experience before investing in such a design. And has the apex seal problem ever been solved? Taking such a risk on that component of the car could be very risky.