The design is already done and first prototypes for the 04-07 Rav adapter PCB are on their way to me. I was reviewing the pinouts for the later version "3rd gen Sienna" to begin the preliminary schematic design before laying out a PCB.Yes, the 2012 rav4 and 3rd gen sienna pinouts are compatible. But i thought you were targeting the '07 rav4 first?
If you're targeting the 2012 rav4 you probably want to sell it as the "3rd gen sienna" pinout. that's what everyone knows that pinout as for now. Otherwise you'll get people with earlier rav4 harnesses buying and complaining.