MCU's ‘Avengers: Secret Wars’ rumor teases Thanos comeback; Marvel Studios has not confirmed

Fresh Marvel Cinematic Universe rumors have fans talking again. A new roundup claims Thanos could return in ‘Avengers: Secret Wars’ and that a first look at ‘Spider-Man: Brand New Day’ is getting closer. The report gathers online chatter about casting talks, trailer testing, and alleged leak details tied to upcoming MCU projects. None of it is confirmed, but the speculation is spreading quickly across fan circles.According to a rumor roundup published by ComicBookMovie.com, there is renewed talk that Josh Brolin could reprise Thanos in ‘Avengers: Secret Wars.’ The site points to earlier reporting that “Josh Brolin was said to be in talks to reprise the role last year” and adds, “He declined to answer. He did cough, though.” That small detail has fueled debate about whether Marvel plans to bring back the Infinity Saga villain in a multiverse storyline.ComicBookMovie.com presents the claim as industry chatter, not confirmed casting news. If Thanos appears in ‘Avengers: Secret Wars,’ it would connect the upcoming film to the franchise’s earlier era in a clear and direct way. For now, Marvel Studios has not announced any official casting tied to a Thanos return.The same roundup also highlights several X posts tied to ‘Spider-Man: Brand New Day’ and possible trailer activity. One post claims, “I'm 70% sure they just tested the BND trailer again. Whoever got that shit, i need yall to clearify what it was.” Another shared rumor states, “Apparently, the trailer will be released in March. They're testing three different versions of the trailers. There are different soundtracks, and all three are brand new trailers, never seen before. There are two possible release dates: March 10th or March 17th. I was…”The roundup also includes a translated description of alleged leaked footage. The quoted text reads, “In the leaked footage, we see Peter Parker undergoing a transformation that seems to go beyond anything we've seen before. The story suggests his powers are changing from within.” It continues, “Peter begins generating organic webbing, something he's never had in the MCU, indicating that his…”Another X post referenced in the roundup discusses actor casting talk and reads, “While Debunking AI, #TheFallAndRiseOfReggieDinkins star Daniel Radcliffe addresses the likelihood of joining the MCU or DCU.” At this stage, all of these details remain unverified. Marvel Studios has not confirmed a trailer date for ‘Spider-Man: Brand New Day’ or addressed the Thanos speculation. Still, the rumors have sparked fresh excitement around ‘Avengers: Secret Wars’ and the next chapter of Spider-Man in the MCU.