Last time I played Spore a long time ago, it was very limited and linear.
Will's original intention, which didn't really come to fruition in the final game, was that Spore would have a "T" shaped structure, where you start at the base of the "T" and work your way up to the top bar, like a guided tutorial. The top bar of the "T" is is a horizontal intergalactic storytelling game spanning all the other levels, that lets you swoop back down to the lower levels. But the swooping down part didn…
I remember looking forward to the game for quite a while-- then after release, when the reviews were so mixed, I lost interest. It didn't sound close enough to what I'd been reading about.
This part seems key to me:
> the layers tended to be isolated from each other, and not have direct or interesting effects on each other
If that could be looked at more closely, reworked & resolved better, another attempt at executing the original vision might turn out to be worthwhile. I would love to see a team with enough expertise (and budget) give it a try.
After seeing how No Man's Sky has evolved, it seems to me like Hello Games might be one possible strong contender. Or at least someone who was heavily involved with working on that title.