This is an idea similar to MLB 2K's Inside Edge, except for your own players:
With your Dynasty points, you could buy 'hotspots' for a player of your choice. If you buy hotspots for a player, whenever they walk over a spot where they are likely to make the shot, a small 'spot' on the ground will turn red.
When I say most often, I mean over 60%. Therefore success is not completely certain.
For pricing... I was thinking the better the player, the more points it would cost. A good idea in that case would be to buy it for an up and coming player on your team. That way if they become a superstar you'll know there hotspots and won't have to pay more dynasty points.
I was also thinking that over a course of a dynasty the hotspots would differ as a player improves or get worse. Although the player would be responsible to figure out that a players hotspots were not working though, and they would have to pay a cheap price to update those players hotspots.
If a player is in a slump, you may want to turn off his hotspots, which can be done in the substitutions menu, or the Reorder Roster menu.
Before a n00b says: What about cold spots?
That is a dumb idea.