In the Avengers: Infinity War, post Thanos' Finger Snap, do we have any information regarding the Stan Lee cameos?
Is he alive or erased due to the snap?
We don't know how the finger snap will be resolved so it's possible that the whole thing will be undone in Avengers 4 but what we do know is that Stan Lee has already filmed that cameo.
During his appearance at Wizard World Nashville 2017, Lee's personal manager revealed that the legend has already filmed his cameos for five upcoming MCU entries, up to and including 2019's Avengers 4.
Noticeably missing from that list is Captain Marvel, which hits theaters in March 2019, prior to Avengers 4's release. It's unclear when Lee is planned to shoot a cameo for that, but one presumes it's on the MCU radar, as is a Lee cameo for 2019's sequel to Spider-Man: Homecoming. Despite his advanced age, there's no reason to assume that Lee will be gone anytime soon, so here's hoping he remains part of the MCU for many years to come.