Approaching the Idea

How I am going to approach this idea? I have been deciding between adding in all the content in to a 'final product' file as I go and creating a clean animation and then adding in all the work from the early stages. Currently I am leaning towards the latter as I think a file with everything it will become too convoluted and hard to maintain order. Speaking of order, I have also been thinking if all the content in the animation should be in chronological order but I have decided that it should go in the order that is most aesthetically pleasing or makes sense in the narrative. The important part is having all the work in the final product, not necessarily in chronological order.