As the name suggests the idea is to create a modular synth like plugin/app.
Principally this could be built out of choice modules from Arturia’s other V Collection synths, even the granular engine from Pigments could become a potential module. Their other plugins would be worthy of consideration asl modules. EFX Refract for example, the 1173 for another.
Since most of this code already exists the idea should be a lot easier to implement and you could build on it with new ideas.