As one of the resident broncos fans here, I'm obligated to chime in, despite being on mobile right now, so forgive any typos or shorthand...
The fact that we haven't played a good team recently scares me, it really does (unless you count a beaten up Baltimore team or the Bengals). I'd be lying if I said in wasn't nervous. However, good teams win games and as you all know from your many win streaks...an 11 game win streak is impressive regardless of who you're beating.
Not only have we won 11 straight, but we've become just the second team in 60 years to win 11+ by 7 or more points. In other words, not only are we winning, but were not even playing close games. So as far as what else they can prove going into the playoffs...not much. We did lose to the three best teams we played, but its hard to say how we would've played if we matched up later in the season. Not to make excuses (though I will), Peyton's first few games he was playing on a brand new team, in a brand new scheme, after sitting out a year of full speed regular season games. That's not easy, and it was going to take time to adjust. Getting DJ Williams back from his suspension at LB was helpful and our D has really looked strong the second half of the season (granted, we didn't play many scary offenses, but still). Although, I think it was the OP that said we beat the Saints in week 2...it was later than that, after Bree's had really started playing better, and aside from that falcons game, the saints didn't have a worse offensive performance all season.
What will happen if/when we play the Pats? Who knows, it's the NFL...but while last game was very one sided...we're in a groove offensively now AND we'd be at home, which is a huge, huge advantage for us.
I'm really confident in my team, and I still think we can win it all...the only top 5 offense AND defense in the league indicates we have the balance for it...but if there's one team that can stop us, it's you guys. Whatever happens, it should be fun.
Feel free as always to ask any questions about how we play, might match up, etc. I haven't missed a Pats game or a Broncos game all season, so I have a good idea about the two teams. Now if you'll excuse me, I think my hand is about to fall off from typing this on mobile.