Assuming they get their butts handed to them twice again in the next five games...
I don't see how they can realistically get back to championship-contender in one offseason, keeping the Big 4. They need an athletic center, they need a good backup PF (Baby ain't cutting it), and they need a good backup SF (same with Green). They'll have the MLE to work with, vet minimum contracts to work with, and they might be able to get something in a BBD sign-and-trade (and maybe with Green as well).
Not a lot of other trade assets on the squad. Those that they have (Bradley, the Clippers pick), they're going to save, for the same reason they'd trade Ray before KG.
KG's contract would be VERY useful if Orlando puts Dwight Howard on the block next season.
Orlando won't trade Dwight this summer, no way, they can't. If they're still playing like crap next year, though, and he looks ready to walk, a lot stranger things have happened. KG's expiring contract, maybe Ray's (expiring contract), and whatever other trade assets we have... maybe something could happen.
We'd almost certainly have to absorb some of their other bad contracts (Arenas... yikes). But, they won't trade KG this summer no matter what happens against Miami, because they could well need him to get Dwight.