If you will notice, the mule has the exact proper proportions for a mid-engined layout. The seating position, wheel base, and proportioning are all spot on with the current generation.
I would absolutely love it if it were mid-engined...in my wildest dreams they have gone back to the HSC and are now testing the engine meant for the ASCC in a mid-engined format. There is a lot more room in the mule for an egine than there is in the current NSX...
The question remains, how are they getting sufficient air to it, if it is indeed mid-engined? I guess the intake could be routed to underneath the car...