The Oklahoma City Thunder are the only thing that could get in the way of the Oklahoma City Thunder. If last year was any indication of what is to come, that's not going to happen.
NBA teams are often destroyed from the inside. Players don't get along, aren't happy about their contracts, clash with a coach or a front office. We've seen dynasties or near-dynasties fizzle out for each of those reasons, and I don't want to get ahead of my skis here — but the Thunder don't seem in danger of that happening anytime soon.
Of course, it's easy to say that about a burgeoning team that just won an NBA title.