I fully understand where you are coming from but you are but you are overlooking a very simple fact: these are not hard points to come up with, no matter what this community may tell you, game freak aren't a bunch of idiots that have no idea what they're doing, these points would 100% have already come up at some point during development and they clearly have a plan for them because otherwise this game would not exist, the legends series is just a place for them to experiment and get creative without steering the main series off-track from its repeatedly proven to be successful formula, there are no rules for what a legends game can or should be
What I'm saying is that the pieces we've seen so far add up to a suspiciously small picture, if this is all there is. And this is, remember, not just the big Pokémon game release this year, but also the first in two years. It's not entirely impossible that the game is this small in scope, but they are setting themselves up for major backlash if it is. The map and gameplay as shown appears too small to carry an entire game on its own, so we seem to be missing a lot of its content. It could be some sort of dungeons, time travel to past and future versions of Lumiose City, or explorable biomes beyond the city limits.
Either way, I'm pretty sure they wouldn't be making a Pokémon game centered around catching Pokémon, without the customary deserts, snowfields, open seas, or rocky cliffsides for them to inhabit. Because, assuming the main gameplay loop is to explore the world, catch Pokémon, and battle, what would be the benefit for the developers of setting it all up in a city, where all the action happens in city streets, on narrow rooftops, or in small parks?
as for your point about the train station specifically as it's not covered by the above paragraph, the short intro scene from the presents doesn't seem to be a scene in the actual game as it's labeled as "not reflecting actual gameplay experience" and if anything I think is just supposed to represent how we the viewers were going to see lumiose, mirroring how the player arrives there at the beginning of the game
actually now that I read your paragraph again I realize how nonsensical it is, none of what you're citing as evidence is actually evidence for anything, you're acting like you can read the game designers minds and know exactly why everything is the way it is but when you cannot be sure of anything, the shot of the main character at the train station does not indicate being able to travel, it's just supposed to be supporting imagery for the text talking about your arrival to lumiose, the building being large with a spire is because it's an important building to the city, of course it has fancy architecture (I have a very similar train station in the city I live in, there is nothing special about it) and even if it is an important landmark, that doesn't mean you'll actually travel anywhere from there, I imagine it'd be one of a few different regrouping spots of sorts where you can go and get some healing or buy items, I also think it will serve as the main one of such for the beginning of the game
I know a thing or two about game design. One of which is that you don't put effort into showing things that aren't important. If the train station is only there to be a set piece in the opening cutscene, it doesn't need to be a landmark. Take the beach in Legends Arceus as an example, it has no distinguishing features because it isn't important later on. The first rule of designing game worlds is that you make the important features stand out, to guide the player toward their objectives. The only reason to give the train station a spire, from a game design standpoint, is to make it easy to find again from afar. That suggests it holds some importance. It's not entirely impossible that it's mostly a visual reference point for orientation in the early game, but I doubt it's a regrouping spot, since no other places on the map are marked in a similar way. And again, the Z Hotel is right next to it.
you didn't even address my point that if there really was more to this game than just lumiose then they would have shown us such instead of reinforcing that the game is set there, your arguments completely crumble in the face of marketing logic
Mind that we're still very early in the game's marketing, and Pokémon has always been tight-lipped with showing content until much later in their marketing campaigns.
your idea about catching pokemon to bring to lumiose is also contradictory to the information presented on the official website which I at this point have to assume you did not read very well
Contradictory in what way? We know the urban redevelopment program is key to the plot of the game, and that the Wild Zones constitute a major part of it, but we don't yet know what role the player will have in the redevelopment plan. Working to increase the diversity of Pokémon living in the city is a logical way to tie the gameplay loop and the plot together, but I'm open to other suggestions if you have any.
Mind you, we have not yet been told any reason
why we're out to catch Pokémon in this game. Presumably, the Kalos dex is already well-known to the local researchers, unlike in Hisui where they just got off the boat and wanted to map out what creatures were living in this strange, new land. There's no talk of any professor yet. Heck, with the Wild Zones already fenced off and small enough that you could throw a frisbee across them, it shouldn't even be a matter of "cataloguing the wildlife in Lumiose City" or anything like that, because any park goer could tell at a glance what Pokémon resides in any of the tennis court-sized patches of land. Pokémon is a collection game, and we're yet to see the reason why we are collecting this time.
I just want to bring you back down to earth so that you're not disappointed when the game turns out to be exactly what the marketing said it was
I'll leave it up to my fellow moderators to judge whether your tone constitutes a breach of the "disrespect to staff" rule, but I'll ask them to consider the matter.