That's crazy that he is only half way to Wayne.
Hockey strikes have hurt his production a little bit.
In 2004-05, if he had played (big if but possible) he might have got 30 goals. (No Calder trophy, though.
)
The second moronic strike cost him 34 games. He scored 32 goals in 48 games. At that pace he would have scored about 55 goals so he lost about 23 goals. So 53 lost goals through no fault of his own.
So, he conceivably could have been on about 500 goals right now.
He currently has 6 years left on his contract. (2015-16, 2016-17, 2017-18, 2018-19, 2019-20, 2020-21)
If he were to score 40 goals a season on average he'd end up with 740 goals. (1 behind Brett Hull for 3rd all time) If he were to play 5 more seasons and averaged 30 goals a season he'd end up with 890 goals. Still slightly behind Gretzky's 894.
That would have to include a lot of things going right as far as injuries go, of course. Also, I'm not sure he'll be able to sustain that kind of production. Plus, I have the feeling he'd like to play in Russia after his contract is up.
Without the 53 lost goals he'd be sitting on 837 goals which would 2nd all time.
Anyway, I definitely think 700 goals is doable if he stays healthy and plays a little longer in the NHL after his contract expires. At 40 goals a season for the rest of his contract he'd have 687 goals which would be 3 goals behind Lemieux for 10th all time and 7 behind Messier for 8th all time.