
At Summer Game Fest 2024, the expectations for Sony and Xbox are centered around updates and partnerships rather than bombshell announcements, as the most significant headlines are usually reserved for their own first-party shows.
For Sony, there is a possibility of getting a debut on Spider-Man 2 DLC, as an expansion has not been officially confirmed but the original game had an additional three-part campaign. Other potential updates may come from Astro Bot or Concord, which were featured in the recent State of Play. There might also be a chance for the rumored LEGO Horizon Adventures to make an appearance.
As for Xbox, the focus is likely to be on updates and partnerships as well. With Call of Duty: Modern Warfare 3's newest season already launched, another IP crossover could be a possibility. Additionally, there might be some news related to the recently released Porsche-branded Xbox consoles.
Both platform holders are confirmed to be part of Summer Game Fest, but it is important to note that their main focus will be on their individual first-party showcases.

At Summer Game Fest, Steam might make announcements related to updates, new features, or hardware accessories, rather than a new game. This is because the event is focused on upcoming game releases and updates, and Steam, as a gaming platform, is more likely to share news related to its services and products. Additionally, Valve, the company behind Steam, is known for its hardware innovations, such as the Steam Deck, which could be a potential focus for their announcement.

Based on the information provided, it is quite likely that Spider-Man 2 DLC will be announced at Summer Game Fest 2024. The event has a history of featuring announcements from a wide range of developers and publishers, and with Sony being a confirmed participant, it provides a suitable platform for such a reveal.
In terms of hints about the content, the recent update for Spider-Man 2 may have inadvertently revealed upcoming DLC plans. The patch accidentally let players access a development menu that mentioned a "Beetle Villain arc4." This points to the possibility of Beetle, aka Janice Lincoln, being the main antagonist in the DLC. In the comics, Janice Lincoln is the daughter of Tombstone, a former villain in Marvel's Spider-Man 2. Additionally, the cyberattack leak on developer Insomniac Games back in December 2023 included files hinting at the addition of Lady Beetle to the game.
While Insomniac Games has not officially announced any DLC plans for Spider-Man 2, the accidental debug menu and the previous DLC content from the original game suggest that there is a strong possibility of DLC being released for the sequel.