Most people you would want to recruit for a collaborative world-building project would be more interested in the creation of cultures and history (battles, empires etc.) and interest in geology, geography, ecology, and that general side of world-building is a bit less interesting in a collaborative setting.
I've seen it on this forum and in many other places, the projects are most lively when everyone is making their own cultures and having them interact with each other. When you're stuck on iterating upon a dead lifeless planet, fewer people are interested.
I guarantee you come up with a planet with a fully realized geology and ecology and people will jump in right away with their longstanding ideas for fictional cultures and try to fit them into your planet. Things only get more creative and interesting when there are already constraints to work around, such as a pre-existing planet.
So finish the climate and ecology of this particular world and when you relaunch it have it so that everyone can start by creating and placing their own cultures and civilizations. You'll have a lot more participation than if we were building a world from scratch. Like if you gave someone a empty city of legos to fill with life and play around with, rather than just a pile of bricks.
You should probably relaunch it in shared worlds, also.