Seems likely. The Broncos at least added some Vets to their defense, and Seattle is still Seattle from last year. The 49ers looked to up their team a bit though and should be a bit stronger competition than they already were last year.
I haven't kept up to much on the AFC but I don't see a whole lot of competition forn Denver. The Patriots will probably be better than last year offensively, but I don't see a lot of strength anywhere else.