After Effects: Importing Illustrator sequence?
I have tried the following steps with 4 layers, and it seemed to work.


Name the file with the state 1 set, your-filename-1.ai and the file with the state 2 set your-filename-2.ai. Make sure they are in the same folder
Open After Effects, click File -&gt; Import -&gt; File... and click your-filename-1.ai. Make sure the checkmark is checked as shown below:


  

To keep all the individual layers, set Import As: to Composition.
 3. Now you will have a composition in your project panel named your-filename and a folder named your-filename Layers that contains all the layers.
 5. Now you can open the composition and check Frame Blending -&gt; Frame Mix for every layer that you want to tween.
 6. Don't forget to enable frame blending. The image below shows how to do this:
 

Now you have an animation from state 1 to state 2. To change the animation playback speed you can use time-stretching on a layer-per-layer basis.