I really think Wade may hang it up, after this year, especially if they win another title. Remember, he's been barely getting through the season for the last three seasons. No team is going to give him a max contract, even the highest bidder is going to be some mediocre team, like Milwaukee or Utah. He also has alot of obligations and new business ventures, outside of basketball. He's already reached the highest pinnacle that basketball player can reach, and he's in decline.
My sarcasm-meter might be off here, but why do you include Lin in this equation? Lin is a below-average point guard in NBA, over-hyper by his own race of people. He's really nothing special on the court.