With the flood of new people to Lemmy, I think everyone is busy with making sure that everything is working as intended, the servers are running, and other basic needs. So in my opinion it might be a good idea to bring it up at a future date (I might be wrong idfk) but anyways I love the idea of big events like r/place offered I think it would be great
I'm going to say not on Lemmy (since Lemmy by definition is for what we're doing right now), but yes on the Fediverse. And maybe you could embed it in Lemmy somehow.