I just picked up on this thread and here's one simple way I can think of to try doing it. Simple in the technique but I suspect it will bed extremely hard to get it to look convincing.
Film your dude (or dudette) cueing on the pool table with no balls at all.
Take a still picture of each ball that should be on the table, making sure they have an alpha channel background. Import them all into your NLE of choice. Place each image in a layer of its own. then simple animate each layer independently using standard pip techniques.
The ball won't be animated as such and so will not have a convincing 'roll' to them. But if you a UK style pool table the balls have no stripes anyway
If that is no good for you then I suspect you are looking at serious 3D animation using somethign like Maya and then compositing in AE. Give my version a try though, no extra s/w to buy.
remember, I'm just thinking out loud here and haven't tried this in any way, shape or form.