1) Look at KeyShot render with the Animation option. The latest version of KeyShot has a "toon" shader that gives a very nice illustration quality to 3D models, and you can easily animate your models within KeyShot. Sample toon shader animation: http://keyshot.com/forum/index.php/topic,6409.0.html

2) If you want to just move 2D images around and animate some connecting lines and text, Adobe After Effects alone will work well.

3) Also take a look at Element 3D. It is a plug-in for After Effects that allows animation of 3D models within After Effects. See: https://www.videocopilot.net/products/element/

4) Finally, look at SimLab Composer. It has animation capability. http://www.simlab-soft.com/3d-products/simlab-composer-main.aspx

SimLab, KeyShot and Element 3D work well with MoI obj models.

Ed