The details of this needs to be figured out, but we need a way "extending" the async dependency loading and coordination that happens in js-modules so that we can somehow programmatically register additional dependencies that need to be loaded before a bundle module starts executing i.e. not just JavaScript resources.

We are considering using this in Blue Ocean for loading of static resources such as language resource bundles. When js-extensions bundles are being loaded we'd also ensure loading of the associated language bundles for the extension and the active langauge (from browser or whatever).