"With Sonic x Shadow Generations, we wanted to bring Sonic Generations to PS5 and PS4 while pairing a brand-new Shadow storyline to crossover with the original story. With Shadow’s portion of the title, players will get to know him more as a character and understand his motivations. It will create the ultimate celebration of Classic Sonic, Modern Sonic, and Shadow gameplay that all fans will surely enjoy." - Takashi Iizuka

Rumors, rumors, rumors

I can't believe they actually called it that (love wins).

At the beginning of January 2024, rumors were spreading of a Generations remaster, which caused everyone to be worried about the possibility of the original Generations being delisted on Steam and causing problems with the modding scene. Which their worries were based on previous situations like with the 2D Sonic games being delisted on Steam once Origins released.

Rumors also began spreading of the new Generations Remaster also involving Shadow, with the title being Sonic x Shadow Generations.

People became more worried as Sonic Generation Steam Keys were suddenly listed as "unavailable" and Sold Out on third party websites and SEGA was also having a franchise sale for Sonic games, with Generations not being included in the sale; causing people to worry even more that Generations on Steam would be delisted next. Thankfully, this was not the case and Sonic Generations is still available to purchase.

Before the official Sony State of Play, nobody was sure if Shadow's campaign was going to be some kind of "encore mode" similar to Sonic Mania, or if Shadow was going to simply be a reskin of Sonic.

Finally, on January 31st, 2024; Sony's State of Play revealed the Sonic x Shadow Generations was fully revealed with Shadow getting his own campaign showing off new abilities and Black Doom returning as an antagonist.

Announcement Trailer Analysis

As Shadow interrupts Classic and Modern Sonic's scene together, they do the iconic pose first seen in SA2B's intro, which is also references in Sonic Generations rival battle as well.

The song that plays during the Shadow Generations part of the trailer is Smash your Enemies by Tomas Herudek, which can be listened to in full on Youtube [here] SEGA is listed as one of the companies that has used his music, on his website as well.

Final Chase, the first area shown off and the first legacy stage confirmed in the Shadow Generations part of the announcement trailer. Smth I think abt when seeing this area is that the colours are nice; not as bright as the original SA2 textures, but not as dark as the Shadow the Hedgehog textures either so it feels like a nice in between.

We also see Shadow attacking enemies in the next scene, and his homing attack is similar to the one seen in both Shadow 05's cinematics and 06's gameplay, where he quickly teleports to enemies.

The next legacy stage shown off in the announcement trailer is Radical Highway, proof being the Chaos Cola sign that Shadow shown very briefly at the beginning of the scene after Black Doom's Eye flees.

I've heard some ppl wonder if this was Westopolis since we see Black Doom's Eye prior to this scene, but it also could be a mix of both somehow since they share a lot of set pieces.

When attacking the large bubbles during what is most likely a part of the Biolizard section of the trailer, there's after images as Shadow moves. You can also see this briefly when Shadow is kicking the satelite-looking item near the beginning, prior to Black Doom's Eye being revealed.

Two things in this scene! Firstly, during the Biolizard fight Shadow is firing a Chaos Spear; this is another ability from '06 being shown in Shadow Generations.

And the second thing, which you can see earlier during Final Rush also, is the hint circles! It's interesting seeing them here in the trailer.

Another thing that's really exciting to see is that there's extra cords hanging off the Biolizard that it can control similar to its tail, meaning there's more to watch out for during the fight most likely.

Another interesting thing is the "COMING AUTUMN 2024"
on the offical website is highlight-able text!

What we know so far

- Final Chase/The Ark, Radical Highway, and Cannon's Core (?) are shown in as returning areas
- Shadow can use Chaos abilities, like Chaos Spear, and Chaos Control; the description for Shadow's campaign says "never before seen powers" meaning there's going to be more abilities aside from what we seen
- the Biolizard is confirmed as a boss fight
- there's a new type of enemy, which are connected to the floating purple and black cubes seen in the trailer
- "When Shadow’s old nemesis, Black Doom, reemerges and threatens to take over the world" Sonic Wiki Zone & Steam Page (Web Archive) this means that, despite only seeing Doom's Eye, Black Doom will return
- "Sega will not reveal where the story of Shadow's campaign takes place, preferring that the players learn about it when the game comes out" - Ian Flynn, February 16th Q&A Podcast