Offsetting my animations

I made an animation a while ago that I’d like to reuse, but I want to put some other material in front of it. Is there a way to make all of the keys about 100-200 frames later in the movie, or do I need to select each object and modify its animation curve one at a time?

You can parent to an empty all the objects to which you want to add some delay and add a TimeOffset (in the Animation buttons F7) to the Empty. If it’s not on, push the Offs Par button so the TimeOffset can propagate in the parenting link.