The House Cup alone, with nothing else, is a nice idea but I really think the Houses will struggle to form teams unless a series of other community-encouraging measures are taken. Creating autonomous communities under the Curia umbrella will do that, with Houses forming natural rivalries and competition as their respective systems of government, recruiting practices, traditions, Olympic performances and representation in the Curia goes through boom and bust.
The Curia will enter a new era of being the United Nations of the TWC Houses, the primary function being to support the existence of the Houses, rule on the formation or cessation of new or defunct ones, ensure the organisation and occurrence of the Olympics and act as the open floor for every member of every House. This will give it a continual, relevant role, as opposed to the current function of doing little more beyond approving Citizens, 99% of whom then never look back.
I love the idea of the Curia, and I love the idea of Houses being the vehicle of communal spirit for the Curia. I think anyone with a genuine interest in seeing the Curia become something relevant to every Citizen every day should rally behind this idea. Reviving the Curia as the glue between the new Houses will usher in a new age of activity and relevance for what, to many, is nothing but a relic of the past.