I know the King Cobra is a Mustang but there’s a handful in the game. I was being more specific. I was just under the assumption that the OP meant the Falcon from the previous Forza titles and not any other variant or model year.
I find it funny they failed to include the Falcon in FH2 seeing as it was in FM5. It’s unfortunate because it’s a great car. But yes, the Mustang would be the closest thing to the Falcon.
Any Australians here will know that when you mention Falcons and Commodores you think more of a suburban family car more than a race car of any sort. Most Falcons and Commodores you see on the streets here would be struggling to race in a D class contrary to the Mustangs you mention which are more of a sports car.
They do make S class Falcons and Commodores of course, and you see these racing around Mount Panorama IRL as in FM5. But the Falcon GT you see in FM5 was a pretty sporty car back in 1973 and even it was a D class car.
I doubt you’ll ever see Falcon family cars in a Forza game. They’re just not very exciting cars to drive.