It's not a shared setting, except in the sense that it's based on a shared setting (FR) and game (D&D). It's fairly common for book adaptations to vary from the source material and for folks to argue about it. The fact this forum carries everything as a holy war is a different thing really. For the movie though, it doesn't need to be anything in particular, it's about the expectations that some folks have about the material heading into it and how it deviates from that. When they come to a discussion forum to discuss this, they've entered a battle as should be obvious if you look at the responses to my post that precede your reply.
So, to reiterate, there is a baseline rules set and setting established. Deviating from that is fine in your space, but in a shared space you can't make that assumption. When you have a property based on that shared setting and rules, deviation from expectations will result in some people disagreeing with the choices made.
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Yeah, I'd love a solid gnome presence, but then you get into logistics issues that cost $.
Fourth edition broadened them out more, but they never really took a large foothold elsewhere for sure. I don't think they'd "drop into" a generic fantasy setting movie though. Besides, if we're stealing from Eberron, a changeling would be fun, but of course cgi$.Warforged are an Eberron race and this is Faerun. Technically. I say this as an Eberron fanboy who keeps buying Baker's third-party 5e Eberron books.
Eberron would make a great animated series, even if I never really liked Sharn for a variety of reasons. A lightning rail based series of pulpy mystery would be fun.A lot of the rest are just a ton of makeup and/or CGI. Do Tabaxi and risk looking like a Cats knockoff? Iffy. A lot of these races aren't from the PHB, either. Dragonborn are, but now you've gotta convince a non-D&D-interested audience why the dragon-person isn't a villain or monster.
I can see why they made these choices for the first shot. If it's successful, you can make more movies and take bigger risks. Man, do I really want an Eberron-set movie, now. The whole setting is designed around pulpy adventure and it establishes a pretty distinct take on fantasy, and it's not even a big risk for the audience; Arcane's setting within League of Legends is magipunk too and that show got tons of acclaim, both popular and critical.
The races seems sort of the "easy" / low effort level to keep costs down for the intro movie. Hopefully a future movie can push the look a bit more without becoming too much.