Potential New Stage?

[Olimar Too Small]

I found this stage on Wario's page on the Ultimate Website and it doesn't look like any stage we've previously seen. What do you think it could be? (This is my first post so I'm super sorry if I've screwed up in some way.)

 

[RamOne]

It's Tortimer Island.

 

[Olimar Too Small]

Oh. Right. Good point. I didn't play that stage much. So I didn't recognise it.