Honestly this move just feels like a desperation attempt, due to the sharp decline in user count drop for OW2 (You can even tell this by the fact they are dropping OW2 on Steam first and have it as their top priority).

Also it says in the very tiny fine print, that the game still requires both a Battlenet account and the client itself, so really, having it on team just makes the game a glorified Battlenet launcher with an extra step (And I doubt Blizz is working with Valve to allow for all of Steam's features to work fully with Blizz's games, this just comes off like a Ubi dump catalog).

While it's a nice move, I feel like it's also a big half arsed one, primarily because they still require you to use both their account system and client, meaning they only ever want to siphon users from Steam, not sell and become involved with Steam's ecosystem.

Considering I own most of the games on Battlenet, I've no real reason to buy them on Steam, because there's just no incentive nor use for me to do so.

I also don't see OW2 picking up on Steam as much as Blizz (or rather Acti) thinks it will. People already know the state the game is in publicly, and charging £15 a pop for the DLC and have a cash shop with high priced cosmetics and a really shitty battlepass that still hasn't changed, isn't going to magically win millions of Steam users over (especially when said non battlenet users on Steam are going to be told they need to install yet another client and make yet another account and then have to use battlenet to launch said games like you have to for Ubisoft/R* games). 

If it were up to me, I'd rather just have the games sold on the storefronts, no extra launchers or accounts required, but seeing as how battlenet is integrated into all of Blizz's games, that makes it insanely hard to make a new system and migrate decades worth of accounts and data onto. 

You'll need to install battlenet client on the Deck, because the fine print on OW2's Steam page says you'll need to login to your battlenet account and also use the battlenet client, meaning you launch the game from Steam on the Deck, then it'll ask you to either install battlenet client or it will launch the client if you have it, to which it will then launch OW2 and then log you in once you get into the game. 

You will gain access to SC 1 remaster as well as SC II and it's expansion packs, but sadly, they are not selling the OG Warcraft 3 and it's expac pack, but the horribly made WC3 Reforged (which is still not fixed to this day).

I'd def recommend going for the two SC games, but completely avoid WC3 Reforged. If you wanna play WC3 as it was in it's OG days, I'd suggest "other" means (like I did, when Blizzard took away the copy I paid for years ago, when they released Reforged...)

I really hope I'll be able to play Blizzard games on my Steam Deck without pumping through hoops to install Battle.net on it.

First thing I hope happens when the deal is finalized. Phil lights a fire up Blizzard's ass to completely fix WC3 Reforged and implement all that was promised! Not going to happen, but at least it gives me some hope lol

Why ain't it on Steam in Japan?

Can't you use a worldwide Steam key? Shall someone gift it to your Steam account?

No idea. I thought it wasn't on Steam at all until somebody said it was but then I just got the "not available in your region" error when trying to look at the page.

I don't think a worldwide Steam key would work. My past experience with them suggests you need to change your download region over first before it will accept the code. I have family in the UK so I've had them log into my account to change the region before, so it can be done, it's just a pain in the butt.

Meh hard to tell. While I agree OW2 has been in decline, Activision did release Modern Warfare 2 on Steam from the gecko so if anything, it sounds more so like a natural progression. I am sure they plan on keeping OW2 around for a while so that and other active games moving to Steam makes sense. While Battle.net will likely still be required for a while even through Steam, I do think they are on their way to sunset it eventually.

Biggest hope for me and more. Also I want my damn copy of WC3 OG and frozen throne back Blizz =/

Yeah, the fact that all they're going to show at this yrs Blzizcon being D4, OW2, Warcraft and the 2 mobile games, I can sorta tell that the client's usefulness is coming to a slow end. The mobile games don't really need battlenet client to launch, leaving you with only an MMO and 2 other games, and 1 is already hitting Steam this yr, so over time there will eventually be no point in Battlenet client being useful to have around (it's already barebones as is).

There are lizard people in COD now?