Well the first movie in my opinion was about disillusion for the most part. The Addendum follow-up then also pretty much did so with the additional info about the FED's money mechanics and that economic hitman concept. The Venus Project part then was about sort of a vision which isn't totally off the scale but also doesn't really fit to the rest. I don't want to say that the Venus Project is bad but it shouldn't be the only project of its kind (you even could argue to call it a "project" anyway as it seems to be pretty much just a one man show) and doesn't really offer anything besides some design studies. Not that one shouldn't dream about things but combining it with the informing tone of the movies just doesn't fit. Especially as it's an extremely complicated and wide topic it would have deserved a film of its own rather than just throwing it in the Addendum movie. It switches from giving you some info to an old man presenting his design ideas - to my mind this didn't work out and wasn't really made interesting in terms of how it's actually done on the cinematic level...