People loved Xbox One's Forza Horizon 2, and that was a game that was also available on the Xbox 360. 🤷
You do know Forza Horizon 2 on Xbox 360 and the Forza Horizon 2 on Xbox One arent actually the same game?
They are quite different games....they only share the name, they might as well have called FH2 on 360 FH2Lite, because its not the same experience.
FH2 360 was developed pretty much independently by Sumo digital and wasnt actually open world like FH2 One.
FH2 360 uses the OG Horizon engine while FH2 starts from FM5 as a base.
FH2 360 doesnt have weather, tuning or even the new Drivatar system thats staple in Forza games now.
IF thats how MS is going to be doing crossgen thats actually hard work, and unlikely to be the strategy they would use.
Its easier on devs if they just develop the game for Series X and then do cuts and optimizations after the fact.....then pray that it works on the Xbox One.