It all comes down to motivation. They want one thing and that is their 3rd championship in a row. They dont have a whole lot of youth on that roster, and the youth they do have (Bynum) they have to handle with kid gloves.
If they can miraculously stay 100% healthy, and I should really say 110%, they have a shot...but so do the Celtics.
What are the chances that all of those guys, Kobe, Gasol, Artest, Bynum etc will make it through 82 games with no issues? If anything comes up you can bet Phil will take his foot off the gas like he did last year.
If there is any team that has noth youth AND talent on their side it is Miami but you have already seen the injury bug hit them.
There are many variables that go into the success of a 70 win season, and there is ALOT of luck involved. there is a reason it has only been done twice once!