for who is interested I started to develop a simple CDI extension to smoothly integrate the fantastic Axon Framework and CDI.
I needed such integration for a my project, so it covers my use cases, but probably it does not cover the others.
You can checkout the project from https://github.com/kamaladafrica/axon-cdi
There is also a quickstart project that shows how it works, checkout from https://github.com/kamaladafrica/axon-cdi-quickstart
Contributions are appreciated (https://github.com/kamaladafrica/axon-cdi#contributing)