Yeah, that is what I thought. Pretty unfortunate, this car is now an expensive paperweight even though (probably) nothing is mechanically wrong with it :( For fun I did try the key dance, but it just goes straight to the odometer since there are no codes. Which seems to be the right behavior for this year/model. I did find a guy on reddit who was working on decoding the PCI bus comms to perform some rudimentary DRB emulation, but seems like he gave up on it awhile ago. Looks like I need to find an indy mechanic who has the DRB3 tool and some experience troubleshooting this system.
Thanks for your help fellas.