After they sign Mike Miller, they will have 4 mill to fill out the rest of their roster and will probably need to keep Haslem. Fisher would have to take the same or less than what LA is offering just to hairlip LA.
Assuming no major injuries to any of the major teams...
I doubt they're going to beat the Lakers this year w/o a stronger bigman corps and LA just added the first point in years who can make basic post entry passes. Remember that the league was also expecting MIA to overrun Detroit in 2005 after they got Shaq and it didn't happen until Year 2. MIA also won't be able to attack Boston's softest spot w/o improving in the middle. Boston will continue to pack the middle on both Bron and Wade, though it'll be much more difficult to do so, but still... If Shaq changes 18 yrs of habit and takes the minimum (if they offer it...he burned bridges there), that changes things a bit.
However, in July of 2011, if the MLE still exists, they could probably find someone to step in there. LA's title window probably has only 2 more legit yrs on it anyway. I don't care how good they are...making the Finals THREE yrs in a row is beating the odds. Each additional year is tougher due to injury, age, wear and tear. If and when Miami wins it, it will largely be due to attrition anyway, so neener. No shame in losing to them if it takes a trio of superstars to do it. PS: Mitch is already setting up a bunch of contracts to expire in 2014. DeMarcus Cousins will be off the rookie scale that offseason.