Amare will average 20-22 ppg I think. The rest of the team probaly will not get as much ppg but I don't think that this will be a bad thing. Nash doesn't need to average 20 ppg. As long as he gets around 15 I will be happy. Marion will go down a bit but that is okay. Having Amare back will also help us when we run into teams like dallas and San Antonio in the playoffs. I honestly think that if we had Amare against Dallas then we would of beat them.
Trading Matrix for Big Ben wouldn't be a good deal. Wallace wouldn't fit in with the Suns style. He has absolutly no offensive game at all. Also it would be too many minutes to spread out.
If Amare can play like he did before the injury then we will contend for a championship next season.