Unused Level in Master of Disguise

Handsome Count Cannoli

Legendary Thief
Wario: Master of Disguise has some interesting unused content.

One of them being the unused temple like level.

What do you think this level was original gonna be?
I think it was either:

A prototype of Algeria gardens.

A prototype of ancient waterworks.

A Training Area for disguises.

A bonus episode that got scrapped for reused episodes instead.

A level that you could customize with enemies and tressures you collected.

What do you think?

I personnaly would have liked to see this level as bonus area in the game.