The odds are staggering against any team repeating, and that makes the feat impressive.
I would, however, put Indy's chances at well above Tampa's and Pittsburgh's chances after their one-time victories.
They have laser-rocket-arm, sure, but they also have several years of excellence in the regular season the last few years. They've moved to close the gaping holes in their defense. I do not know their depth situation, but their starters proved playoff-ready this year. We all know they have cap questions, but we also know (from experience), some guys will restructure and cut a cap-friendly deal for a shot at a ring.
They're the best in the NFL until proven otherwise. Let's not be punks about it. That's what the team has to do, so why should we look at it any different? If the Pats want rings number 4, 5, 6, etc., they have to beat the odds and work their butts off every year... which, of course, is exactly what Indy has to do to stay at our level.
Yeah, I for one do see the Celtics/Lakers, Yankees/Red Sox comparisons as apt... but let's call it Yanks/Sox for now, with the 06 Colts in the role of the 04 Sox.
On the plus side, as of this morning... we're both undefeated.
PFnV