I like the sandbox idea, but the game scenarios can be also like a tutorial to help the new user to know the basic tools and tricks.
Influencing continental drift for strategic purposes would be hard to justify in a realistic/up-to-near-future game, but sci-fi is always there. Or maybe someone needs to try something new, like a 4x game that takes place on an evolutionary scale. Synapsids & Sauropsids. “I‘ve got you down to your last Lystrosaur, bwahaha”