What happened: The Dallas Cowboys defense is placing an emphasis on communication heading into Sunday's action. In addition, the New York Giants are tinkering with their running back rotation.

Why it matters: The San Francisco 49ers are evaluating whether they will operate with a shared backfield. The Los Angeles Rams, Indianapolis Colts, and Kansas City Chiefs also have developing storylines as the afternoon slate approaches.

What to watch: Final inactive lists and depth charts will clarify these roster decisions 90 minutes prior to kickoff.