First things first, there is an AE Expressions forum with the absolute best expressions guy ever, Dan Ebberts, so you might want to post there first.
I have a few questions though. Is the null moving? You have hundreds of objects, and they are all going to be going to the null, is there going to be a delay between object 1 then 2, then 3… are they going to be following each other like a snake or train?
Again, it will probably be quicker if you ask Dan, but these are details he will probably need also, but if he’s not around, I’ll try to muddle my way through it.