If we did get Tinker, it would be for all races. I practically guarantee it. They are moving in an all races/all classes direction, anyway, but we also have the fact that the last two new classes had race restrictions. We haven't had a proper class that at least most races (now all) can play since MoP.
Cosmic greetings, all, I'm the Raccoonatic Commander!
Leowyld of Emerald Dream-US

If this has to be done progressively, Eastern Kingdom is more likely to be reworked first : We already have most human models reworkked, and got a few teases of a re-taking of Gilneas. Moreovoer, the story of Dragonflight put a lot of focus on dwarves as well as blood elves (and nightborne by extension).
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+ Mechagnomes, lightforged draenei, darkiron dwarves, mag'har orcs and nightborne.
It works for allied races too.
I wouldn't be happy with that. And why not Worgen? Fantasy Victorian = Steampunk, it's a good fit for a tech class. I would want Vulpera, of course, and they share most of their skeleton with Goblins, but they are also very resourceful and clever problem solvers, that mindset makes a good inventor (and we have a vulpera literally named Tinkerin' Taji). But, as I said, I think it would be for all races, anyway. Any member of any race can learn about machines and technology and then use them.
Cosmic greetings, all, I'm the Raccoonatic Commander!
Leowyld of Emerald Dream-US
This is probably what’s going to happen imo.
Though I’d see them limiting the “tinker” stuff to Gnomish/Goblin technology. It would probably be too much work to make unique racial technology for every race.
All races can already learn Gnomish/Goblin engineering so it’d make sense.
And it's likely to go that route for a Tinker class as well. I can fully imagine that they'll restrict it only to small races (Goblin, Vulpera, Gnome, M.Gnome) in order to properly give a sense of scale to their mech suits. Additionally in order to make the class more appealing, they'll give each race it's own unique art assets (like Druids, Paladins, and Shaman all have unique art assets for each race).

We have to come together and keep this thread going! 2108 is NOT enough! More! More! How about these "leaks?"
Cosmic greetings, all, I'm the Raccoonatic Commander!
Leowyld of Emerald Dream-US

I don't disagree that it'd be available to all, I made a post earlier that I'd prefer it race-locked where I mentioned that this would of course be unfeasible. But even if available to all, I think it's still going to be less popular due to how it's still something associated with goblins and gnomes. Sort of like how hunters are available to tons of races, but you probably find that a disproportionate amount of people who play hunters probably play Elvish races due to the elven archer archetype
Even people who are not themselves roleplayers often go with fitting race/class combos (with the exception of min/maxing hardcore folk)
Or they'll just restrict it to short races so each race gets a mech suit and each race gets a claw pack. Tall races won't be included.
BTW, the short races will likely also get claw packs in a Tinker class, since Goblins had claw packs in WC3. Additionally in WC3 the mech transformed from the claw pack.

Worgen in WoW are based on victorian gothic themes, not really steampunk
Vulpera are nomadic scavengers, not exactly high tech
Personally I think every race should have every class though, even if it doesn't make sense - let people make their own headcanons to justify it
The moment they gave alliance shaman and horde paladin, they should have done this

Tinker has the opportunity to be an extremely unique class in WoW; imagine how much customisation a permanent mech could have
When out of combat, it could also function as the only mount option for the class etc
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Could also have a ranged caster spec using laser beams and missiles etc