Both United States Champion Shinsuke Nakamura and Rusev haven't been utilised anywhere near as much as they probably should have been on SmackDown Live in recent months and it appears as if WWE's solution to that is to have them feud over the King of Strong Style's title! That's not a bad thing, of course, especially as these two definitely have a lot of chemistry together in the ring.
Rusev was a heel US Champion back in the day, but it would definitely be interesting seeing him get a babyface run with the title, especially as he's so popular with the WWE Universe these days.
It remains to be seen what WWE is planning to do with this feud and if it's going to actually have any legs but a match at TLC definitely seems like a good possibility. Stay tuned for further updates.