The release of the first Morbius trailer [1] has everyone a lot more confused than we thought we'd be, and for one specific reason: a surprise cameo from Michael Keaton.

Keaton's presence is shocking because of the long-standing and complicated relationship between Sony and Marvel [2], which most famously came to a head in 2019 [3] over the future of the Tom Holland iteration of Spider-Man [4]. Officially, Morbius is the second entry in Sony's Marvel universe, which is a separate entity from the Marvel Cinematic Universe owned by Marvel Studios; the first movie in the Sony universe was 2018's Venom [5]. So why is Keaton in the Morbius trailer in a costume that looks suspiciously like the one his MCU character, Vulture, was last seen in? Speculation is running wild over on Twitter — keep reading for some of the best quick takes on Keaton's cameo.