Beta/Unused Stages?

So I found a trailer for Splatoon from a couple months before release, and at the beginning you can see a few maps that look way different from the final version.



If you pause at the beginning with the first map shown, it's either a completely unused or upcoming map, or is a beta Arowana Mall that looks radically different from the final version. If it is Arowana Mall, it's nothing like the one we know. If you pause at the next one shown, it's more obvious that it's a beta Blackbelly Skatepark, but it still looks quite a bit different from the final version. And finally, the next map shown is a beta Camp Triggerfish, and although it might look the same at first, it's actually much different from the final version if you look more closely.

It's really interesting to see some of the original designs for these maps, Arowana Mall is quite a bit different.

It makes sense since Arowana Mall looked very different until the Splatoon Direct and the Squid Sisters even joked about how Camp Triggerfish how to be rebuilt a few times. I also think the stages where change since they where more themed on the beta characters they used before the Inklings.