It's been a while since we've had a Marvel Cinematic Universe leak. The usually airtight security employed around everything and anything related to the MCU makes it difficult to leak something. But, occasionally, something slips, just like this trailer for Ant-Man and the Wasp: Quantumania.

Ant-Man and the Wasp: Quantumania will introduce the big baddie of the Multiverse Saga, Jonathan Majors' Kang the Conqueror. So, you can understand why so many people are hyped for the upcoming MCU movie. Unfortunately, since it's still Black Panther: Wakanda Forever's turn on the spotlight, Marvel Studios is still sitting on any promotional material for Ant-Man 3, including its trailer. However, this hasn't stopped the footage from leaking on the internet.

Now, fans are worried about the well-being of one of the titular heroes.

Judging by the leaked Ant-Man 3 trailer, it will have a darker and tenser feeling when you compare it to the first two more light-hearted films. The first set of movies had their share of heavy moments but were mostly considered a breath of comedic air compared to the rest of the MCU. But, with the introduction of Kang, the first film in Phase 5 of the MCU will kick off the chain of events that won't conclude for at least two years.

The MCU hasn't killed off a member of the Avengers for a while. The last ones to sacrifice themselves or get killed were Scarlett Johansson's Natasha Romanoff and Robert Downey Jr.'s Tony Stark in 2019's Avengers: Endgame. Since then, the MCU has introduced worthy successors to the original members. We wouldn't be surprised if Ant-Man 3 is setting up the incoming Cassie Lang actress, Kathryn Newton, as the new Ant-Man with Evangeline Lilly's Hope van Dyne acting as her mentor.

Ultimately, the appearance of Kang in Ant-Man 3 should give the MCU a sense of direction going forward.

Hopefully, Paul Rudd does make it out of the film alive. But, if not, his presence will be terribly missed.

In the meantime, MCU fans can look forward to watching Black Panther: Wakanda Forever in theaters on November 11. According to a toy listing, Letitia Wright's Shuri will take on the mantle of the Black Panther in the highly anticipated sequel.