Dr. Doom is literally putting all his eggs in the same basket for Avengers: Doomsday. Robert Downey Jr., who is ready to enter his villain era in the MCU with the upcoming movie, shared a cryptic Easter post on social media, complete with Dr. Doom and MCU characters' themed Easter Eggs. This supposedly natural Easter post has sparked debate and speculation among seasoned MCU fans who are frantically searching for its meaning.Avengers: Doomsday, scheduled to arrive in December 2026 as part of the MCU's Phase Six, is set fourteen months after the events of Thunderbolts* (2025) and will follow the Avengers, Fantastic Four, New Avengers, Wakandans and the "original" X-Men as they team up to face Doctor Doom.Downey Jr.'s recent Easter post features Doctor Doom with a basket filled with colorful Easter Eggs containing familiar Marvel and character logos that has created curiosity and anticipation among longtime fans.More on this in our story.Decoding Robert Downey Jr.'s Easter-themed art for Avengers: Doomsday View this post on Instagram Instagram PostActor Robert Downey Jr.'s cryptic Easter-themed post for Avengers: Doomsday is already making rounds on the Internet and fans are convinced they are more than just random Easter eggs and character clues for the upcoming MCU project. Doomsday has been positioned as the most-anticipated MCU film, marking Downey Jr.'s return to the universe but in a new avatar. Since MCU is known for its visual clues, fans are trying to decode the meaning behind these Easter Eggs.The one Easter Egg that is turning the most heads is Captain America's shield, which is dripping blood. With Chris Evans already confirmed to appear in Avengers: Doomsday, the blood-dripping shield spells danger for the Captain, which has certainly made fans worried about the beloved character. Additional Easter Eggs nod to many important (and confirmed) characters in the MCU, namely Spider-Man, Black Panther, the Fantastic Four, the new Avengers, the X-Men, Namor and Shang-Chi.A detail that clearly stands out in Robert Downey Jr.'s latest Avengers: Doomsday art is the two Spider-Men themed Easter Eggs. While Tom Holland is rumored to reprise his superhero character, fans are wondering what the second Spider-Man egg means. A second Spider-Man or a variant of the character could open a door to many possibilities in the MCU. However, many fans are convinced that the second cryptic egg could hint at Tobey Maguire and Andrew Garfield's variants, who are rumoured to be a part of the upcoming film. With both actors reprising their characters in Holland's 2021 film Spider-Man: No Way Home, it would be interesting to see all three Spider-Men under one roof again.Lastly, eagle-eyed fans have also noticed that the Fantastic Four Egg is the only one vandalized with a 'danger' sign, and the new Avengers Egg (Thunderbolts*) is cracked, suggesting a brutal battle with Doctor Doom, the despotic ruler of the Eastern European nation of Latveria.Who is in the Avengers: Doomsday cast?From seasoned Avengers to fan-favorite supporting figures, the cast of Avengers: Doomsday feels like a celebration of everything the MCU has built over the years. These returning characters don’t just add star power but carry emotional weight, reminding viewers of past battles, sacrifices, and victories that defined the saga. Their presence hints at deeper connections and unresolved arcs that could play a crucial role in what might be one of Marvel’s most ambitious crossovers yet.The returning stars include Robert Downey Jr. as Doctor Doom, Chris Hemsworth as Thor, Vanessa Kirby as Sue Storm, Anthony Mackie as Sam Wilson, Sebastian Stan as Bucky Barnes, Paul Rudd as Ant-Man, Tenoch Huerta Mejía as Namor, Simu Liu as Xu Shang-Chi, Tom Hiddleston as Loki, and Chris Evans as Steve Rogers.Additionally, Benedict Cumberbatch's Doctor Strange, Jeremy Renner's Hawkeye, and Holland's Spider-Man are rumoured to return in the upcoming film.Avengers: Doomsday will be released on December 18.