Clark Gregg tweeted out promo poster for “What If…?” on July 8, which prompted a fan account to conjecture that he’s in the show. “Phil Coulson when?” they tweeted. “I’ll die if we get a Coulson appearance.” Gregg then offered a hilariously deadpan reply: “Please don’t.” This is far from confirmation that our favorite Agent of SHIELD is coming back to the MCU, but it’s highly suggestive. Why would Gregg be worried about the person behind this fan account dying if his appearance in the show wasn’t on the table? It certainly makes you think.
Agent Coulson has died a couple of times in the MCU. He’s killed in “The Avengers,” spurring the titular team to form. He’s resurrected in “Marvel’s Agent of SHIELD,” only to die again after the Spirit of Vengeance possesses him. By the end of “Agents of SHIELD,” Coulson is a Life Model Decoy. Any one of these Coulsons could come back on “What If…?”
Likewise, Coulson has history with “What If” scenarios as well. The “Agents of Hydra” arc of “Marvel’s Agent of SHIELD” kicks off with an episode named “What If…,” in honor of the OG comics series. That arc saw Coulson et al. trying to get out of a computer simulation of an alternate reality MCU.
All things considered, it’s not out of the realm of possibility for Coulson to be a part of “What If…?”, but fans will have to hang tight until the series premieres on August 11 to know for certain.