I see these teams as roughly equal opponents. I think the Colts have the worst defense, so I guess that would be my preference, but it's the least likely to happen.
For everyone writing off the Ravens and Texans, beware. In 2005, the Steelers were written off by everyone after struggling late in the season and won the SB. In '06, the Colts had that sieve rush defense and no one thought they'd go far. '08 Cardinals collapsed late in the regular season before putting it together, completely inexplicable. And of course, let's not forget the Giants last year, sitting 7-7 and everything had collapsed.
Sometimes these teams that completely bottom out end up getting a second wind and get a newfound sense of confidence; since they'd already been given up for dead, they have a scary attitude of playing with the house's money while realizing they are talented enough to beat anyone.
I, for one, would not be shocked at all if New England or Denver are not playing each other in the AFCCG, nor will I be shocked if neither are in the Super Bowl. Things change a lot in the NFL over just a couple of weeks, and I expect the roller coaster to continue into the playoffs, just like every year.