If it were flex season yet among the TV networks, Kansas City Chiefs at Oakland Raiders would be a candidate to get flexed to the Sunday night game. It's an old-school rivalry and it actually means something in the AFC West. (Yes, it's still weird to type that).
You can usually gauge how big games are by looking at where networks like ESPN and NFL Network send their crews. If that's the case, then this is a big game. Raiders DT Tommy Kelly tells Peter King he's seen those folks coming out to Oakland this week.