We have enough drama in the actual physical world going on without people on Pokemon forums looking to start fights with other people over the internet. Even writing this out feels dumb that we have to say this.
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On topic - have seen a few videos where more of the Terrarium has been shown, and it looks like a much bigger take on Kitakami in terms of the world building (i.e. it is a separate area, circular in overall shape, with areas to explore with Pokemon in it and having an overall change in height across small mountain ranges, across to lakes and similar, across the four types of terrain).
I am surprised at how much more I like the look of it in the videos than Kitakami, though I think they missed a trick in making it a “sky” dome made out of LED panels, than making it something like glass and having the sea over it. I reckon that could have made for a very cool effect, with the sun coming down onto the terrarium through water instead, and Pokemon could have swum around the terrarium. But hey ho, we have what we have and it still looks like fun.
The question I really want answered is whether the new flying ability for Koraidon and Miraidon willl extend to the other areas of the game, Paldea and Kitakami. If it does (big if I think), then that would open up a new way of exploring these areas and probably give us some fun by just flying around.
The last time we had something like this was ORAS I think, with mega Latias and Latios.