Depending on whats possible, we could do something similar to R/place and every so often expand the canvas
start off with something small eg.512x512 and add another 512 px. along side
If I remember right, r/place โscaled upโ by adding more blank canvas. But it might be more interesting to actually scale up the previous pixels as well, so each iteration is overlaying the previous one with higher detail.
The end result wouldnโt look as empty, because it would be easier to fill large areas early on.
Interesting idea. That would perhaps wreck a lot of pixel art, but I guess it'd be fine scaled up to 2x2 pixels as you often see it like that anyway.
If that happens, it should be a surprise - would really throw a spanner in the works and make it a unique event. The more I think about this idea, the more I like it!