Plumlee could be a very good Pau Gasol type player. He has a soft touch and a crazy vertical.
I think he will be great as a PF to Hibbert eventually. This is because like Gasol, Plumlee plays his offense outside of the paint. One of the reasons Kanter grabbed so many rebounds is because Plumlee doesn't play near the basket on offense. So Plumlee gets rebounds on the defensive end but because the way he plays his offense would mean you need another big man who plays in the paint and who wants to get close to the rim.
The reason why Plumlee plays outside of the paint because he has a soft jumper. So he likes to face up so he can shoot the jumper or drive to the basket. Most 7 footers like to back in and get as close to the basket as they can. Plumlee like Gasol and Dirk like to face up because their jumper gives them more options. Sometimes when Plumlee gets the ball with his back facing the hoop, he will turn around to face his defender up.
This will make Plumlee a special player. Being that tall and preferring to face up your defenders. He has a lot of confidence in his jump shot. I can see him and Hibbert at the 4-5 if what we're seeing in Summer League carries to an NBA season. Look at this video of Dirk. Another big man who has confidence in his jump shot so he loves to face the basket.