Did Marvel’s Avengers: Doomsday trailer just spoil the ending? Here’s the fan theory

The trailer’s most gut-punch moment has Johnny Storm clinging to someone as a planet buckles in the sky behind them, his face saying there’s no coming back. It mirrors the opening image of Professor X watching another world die through a window at the Xavier School. Side by side, the shots look less like a one-off disaster and more like a pattern — realities winking out, one after another.

From there, the fan theory writes itself, and it lines up with big beats from Marvel Comics. The idea: the movie ends in a total wipeout that clears the board for a new stage.

• Doctor Doom seizes Loki’s reality-bending power.
• He forges Battleworld, a stitched-together realm built from the ruins.
• Earth’s heroes return — but without their memories.

Could Marvel really hint at that in a trailer? It’s happened before. The first Avengers: Infinity War trailer included scenes that turned up near the end of the film, so late-game footage isn’t off-limits.

Enter Deadpool

Adding fuel to the speculation, Ryan Reynolds used San Diego Comic-Con to make it official: Deadpool will show up in Avengers: Doomsday. He arrived in a gray suit modeled on the Uncanny X-Force look and did the bit fully in character — poking fun at masks, riffing on a “Canadian tuxedo,” and turning a casting confirmation into a mini-performance.

Ryan Reynolds confirmed at San Diego Comic-Con: Deadpool is in Avengers: Doomsday.

Marvel didn’t say how he fits in. No plot details were offered, and chatter ranges from a quick cameo to a bigger, chaos-agent role that plays into the multiversal mess. Fans are split on whether he’s there strictly for gallows humor or to throw a curveball as the X-Men fold deeper into the MCU.

As for those bleak trailer shots, Marvel hasn’t confirmed whether any of them are pulled from the film’s finale.