SM2.
Only way Starfield sells more is if they rerelease it for next 10 years and maybe they port it to PS.
Skyrim (dragons, medieval) s more attractive setting than space mining/shooter imo. History showed that. Out of 60M, at least 20 (if nto more) was sold on ps3, ps4 , ps5. It sold on nintendo at least few millions (maybe 5).
GP effect. It wont sell more than 5M on xbox.
It ll be big on pc but steam sales re usualy overhyped. It all about f2p, mobas, counter. Biggest 3p games (popular on pc, like Souls) doesnt move more than 5M. Lets give Starfield 10, 12. But i doubt it. Also gp s on pc.
Also there s huge competition today, much more than in 2011. No man sky, open worlds, rpg, shooters. Call me crazy buti think Baldurs gate might steal some thunder from Starfield.