Ranining Cubes to form shape This is the .blend file I'm working with

I created this model with a processing sketch that translated colors into volumes. Now I'd like to have a rain of cubes, having the cubes to land in their proper position to build the batman image. How can I do this? animation node? collisions?
You can evaluate a Delay Falloff and use a multiple of the output as the z location of the objects as follows:



You may also randomize the order using the Offsets input.