Sorry for quoting myself (don't do it kids, you'll grow hair on your hands and grow blind!), but it dawned on me that the Mermaid designers would be perfectly aware what the 20k area looked like before. The LM show building is build on the exact spot of the erstwhile 20k show building, with a remarkably identical outside of waterfalls flowing over rocks amidst palm trees. This, it dawned on me, is not ironic coincidence or convergent evolution, but is in all probability intentional. A nice tribute then, a distant echo of 20k.
A far more subtle salute to 20k and MK1.0 than the 'hidden Nautili' of Pooh and Mermaid. So subtle I almost missed it!
Also, that's right, I really did naughtily use Nautili as plural of Nautilus. Go classics dorks!