I propose a heavy influx of new people somehow (perhaps contact people in your own community irl), and with that influx, a whole slew of new topics being created (and revivals of old ones).
Like literally, there are so many damn things to debate, and don't be afraid to bring simple stuff up for debate.
We've got politics, history, economics, culture, religion, philosophy etc. etc.
There should basically be no way to run out of ideas to debate.
Additionally, I propose that people should post their own personal ideas and proposals about the world and universe onto this forum, not just pre-existing concepts and topics.
Feel my drift?