Based on his track record, I'd say we can expect a solid 1000 yds and 8 TDs. That's being conserative, I feel.
1200 yds and 10 TDs wouldn't be a stretch. He's the most talented WR I've even seen. Even if he's lost a step, few DBs can match him on a deep route and almost none can beat him in a jump ball situation. Alex has never had a deep threat before, especially not someone with Moss' ability. His impact is going to be huge. I just pray that he stays healthy and feeds him the ball.