There are plenty of places where superpowers could put under their influence in the world before they have to challenge each other. I do not think it will happen in our lifetime. Hopefully people smarten up till then.
We have air and sea superiority that no other nation possesses. We would be out of our minds to make it a land battle.
"We ain't a sharp species. We kill each other over arguments about what happens when you die, then fail to see the ******* irony in that." - Justin Halpern