Comic-Con International: San Diego began its 2026 run on July 23 with a series of high-profile celebrity appearances. Early highlights included major panels for the Percy Jackson and the Olympians TV series and A24's upcoming thriller, Onslaught.

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The Hall H tradition and the Percy Jackson debut

Hall H has long been the epicenter of the San Diego Convention Center, serving as the primary stage for the industry's biggest reveals. The decision to kick off the celebrity panels on Thursday with Percy Jackson and the Olympians signals a strategic pivot toward Gen Z audiences. As the report says, this franchise is a favorite among younger readers, and its transition to a television series is designed to capture a demographic that is increasingly influential in the streaming era.

This move echoes a broader trend where legacy book franchises are being reimagined for a digital-native generation. By placing a youth-centric property in the prestigious Hall H slot, organizers are acknowledging that the "fanboy" culture of the past is evolving into a more inclusive, multi-generational experience. The presence of these stars on the opening day suggests that the event is prioritizing accessibility and new-age fandom over traditional comic book nostalgia.

A24's 'Onslaught' takes over Ballroom 20

While Hall H captures the mass audience , Ballroom 20 often hosts the more curated, prestige experiences. The meetup for the cast and crew of A24's upcoming thriller Onslaught highlights the studio's growing appetite for the Comic-Con spotlight. A24 has historically operated on the fringes of mainstream fan conventions, focusing on indie cinema and arthouse horror, but a dedicated Ballroom 20 presence indicates a push toward broader commercial visibility.

The inclusion of Onslaught in the Thursday schedule suggests that A24 is positioning its thriller as a "must-see" event for the hardcore fan community. This strategy allows the studio to build organic hype through direct interaction with the crew before the film hits general distribution, leveraging the concentrated energy of the San Diego crowd to create a viral ripple effect across social media.

From Johnny Depp to Keke Palmer: The Thursday roster

The variety of talent appearing on the first day reflects the eclectic nature of modern pop culture. According to the source, sightings included a diverse array of stars such as Johnny Depp, Dave Bautista, Tom DeLonge, and Mike McCready. This blend of cinematic icons and music industry veterans undrscores the "International" aspect of the event, where the boundaries between film, music, and comic arts are increasingly blurred.

Keke Palmer's participation in the 'Inside The Lucas Museum of Narrative Art' panel further illustrates this intersection. By linking a celebrity presence to a museum dedicated to narrative art,the event elevates the conversation from simple product promotion to a discussion about the craft of storytelling. This suggests that Comic-Con is attempting to brand itself not just as a trade show,but as a cultural symposium.

Who replaces the Thursday stars on Friday and Saturday?

Despite the impressive list of names, the report notes that the star power on Thursday was lighter than what is typically expected for the weekend's peak. This leaves several critical questions unanswered: which A-list anchors are reserved for the Friday and Saturday slots, and will there be any surprise reveals from the major studios that typically save their biggest announcements for the final 48 hours?

Furthermore, while the source lists the celebrities seen, it does not specify the nature of the interactions or whether any exclusive footage was screened during the Onslaught or Percy Jackson panels. For the attendees and the global audience watching from home, the primary mystery remains whether the momentum of Thursday can be sustained or if the event will follow the traditional trajectory of a massive Saturday crescendo.