This makes me so happy
I don't think I can express quite how disappointed I was to not have this song in Smash. It just didn't feel right. This song, it's Smash Bros to me. It's THE song for the series, and the best song the series has ever had. It's so revolutionary and well put together, it's left Smash and become a staple in the Kirby series itself. It's so well made they redesigned the last fight of the remake of Kirby's Nightmare in Dreamland to put the stage and its music in there.
It's too bad the stage couldn't return. But its older brother with a similar design is back, and to me that feels good enough.
I knew the stage wasn't ever coming back. The mirror effect makes that too challenging and they'd have the recreate the entire stage from scratch anyway.