Is Vision actually dead in WandaVision?
Yes—you're remembering correctly. Vision died. And how he returns to WandaVision is anyone's guess—but it happened. ... Both feature Wanda and Vision in classic roles—but with just enough of a hint that something isn't quite right.
Why did Vision die at the end of WandaVision?
The commercials have been moving (somewhat) chronologically through Wanda's life so far, and at this point, we reach Vision's death. Wanda used her magic to destroy the Infinity Stone and kill Vision so that Thanos wouldn't be able to attain all the stones.