McGuffin Hunt.
A triple-A open-world epic that drops all pretence and eschews the shitty amateur writing normally present in 90% of games. Instead, without the restrictions of plot or world building, the game just shouts orders at you like “go over there!” and “bring me five of the things!” in interesting but unrelated locations.
Money normally spent on ‘writers’ and all that other nonsense can be spent on adding more graphics so that digital foundry can’t kill the game dead by pointing out that one part where the frame rate drops to 119fps.
Tell people the game has an innovative multiplayer element but don’t elaborate on that. Don’t include any multiplayer of any kind and once the game is released listen with joy to the nonsense theories people who have played the game have on Reddit and ResetEra about what the multiplayer component actually is. Pick the cleverest-sounding one, join the forum and tell the person they’re right.
Release a Switch port and a next-gen patch after a few months. They’re completely different games.