Any ideas on a good level replacement?

[cheat-master30]

I've just been thinking, and the whole structure and concept of the Super Mario World Easter Eggs level needs a rehaul, as can be seen below, if only because the enemies and objects are from so many clashing tilesets it'd be nearly impossible to make without extensive use of graphics. So, any replacement ideas for this level?

Here's the old map:

http://www.dsultimate.net/photoplog/images/1/large/3_MarioWorldEasterEggsoutside.PNG
http://www.dsultimate.net/photoplog/images/1/large/3_MarioWorldEasterEggsAlternateArea2.PNG

Which isn't really subtle Kaizo enough like the rest of the ROM hack, and is too much a case of Kaizo overkill. But any suggestions for the level? I've pretty much checked all the possible setting concepts, and it's kinda hard to think of something that hasn't been done before or just even done in this ROM hack as a whole. Any ideas?

[cheat-master30]

I may have an idea (I'll make another topic).