If that happens, that is bad news.
However, before we get carried away in any doom and gloom scenarios, let me also say that if Amare Stoudemire was even half the player that his stats would suggest he is, Phoenix would not be perennially missing the playoffs/getting knocked out in the first round.
For the amount of minutes he plays/time he spends around the basket/shots the Suns put up, he's a horrendous rebounder. Calling him a matador on defense is an understatement. Moreover, Shaq + Amare + a very good surrounding cast in Phoenix including two-time MVP Steve Nash couldn't even make the playoffs last year. I'm not sure why Shaq, Amare, and LeBron is all that much scarier.