I'm told V5 will have a number of cool new features, including CHARACTER EMOTIONS.
That's great news. There's been a few workarounds for users in the past. These include making a face animate in Crazy Talk. Some results were cool but the main issue is that the face is not 3d. Photoshop and lighting can also help evoke some emotion. In fact even with the upcoming feature lighting and head angle may aid in the delevery of emotion in your scene.
For your research ..Dr. Robert G. Nulph article
Aaman Akram article