Grant Morrison on Supergirl and Jason Momoa’s Lobo on 23 September 2026

He told IGN the film “wasn’t terrible but wasn’t especially great either” and called Millie Alcock “credible” as Kara Zor-El.

Morrison was much harsher on Jason Momoa’s Lobo, calling it “one of the worst performances I’ve ever seen in a film and quite baffling.”

What happened

IGN reported on 23 September 2026 that Grant Morrison had shared his verdict on Supergirl, the DC Studios film starring Millie Alcock as Kara Zor-El, on his Substack Xanaduum. In the report, Morrison is described as not dismissing the movie outright, but not exactly embracing it either. His overall take was that Supergirl “wasn’t terrible but wasn’t especially great either.” That puts the film in a fairly middle-of-the-road position, and the IGN report does not add any further major positives or negatives about other parts of the movie.

Morrison did praise Alcock. In the passage quoted by IGN, he said she did a “credible job” as Kara Zor-El. That is the only specific praise mentioned in the available source set, and it is aimed directly at her lead performance.

His sharpest criticism was reserved for Jason Momoa’s Lobo. Morrison called that performance “one of the worst performances I’ve ever seen in a film and quite baffling.” IGN ties that reaction to Lobo’s role in Supergirl, but Morrison’s original Substack post was not included in the source set. Because of that, the exact context of the quote remains limited to IGN’s secondary reporting.

The available information also shows that IGN describes Lobo in Supergirl as a supporting character with only one scene alongside Kara. That detail comes from IGN’s reporting rather than a direct Morrison quote. The provided sources do not confirm whether Morrison commented on the rest of the cast, the direction, or the film’s structure.

Background

Grant Morrison is the writer of All-Star Superman, a comic series that IGN says influenced James Gunn’s Superman film. That background matters because Morrison has long been seen as an influential figure in DC Comics adaptations. In the provided sources, his reaction to Supergirl is therefore presented not as a random opinion, but as the view of someone with a clear history in the DC universe.

IGN links the reaction to Morrison’s Substack Xanaduum, but the original post itself is not available in the source set. That means it is not possible to say with certainty whether the quoted lines reflect the full scope of his comments, or whether he discussed other elements of Supergirl in the same post. The fact report explicitly notes that the exact original wording and context of the Substack post remain open questions.

The source set also says IGN describes Lobo in Supergirl as a supporting character with limited screen time. At the same time, the broader context in the provided information suggests there is uncertainty about the exact size of that role and whether it changed during production. The available material does not give an exact runtime or a definitive confirmation of any reshoots or altered role distribution.

More broadly, the discussion around Supergirl is part of a wider DCU news cycle. The internal links point to earlier coverage of DC characters and James Gunn-related projects, showing that Morrison’s reaction sits within an ongoing news context. Even so, the available information remains limited to the quotes IGN reported and the description of Lobo’s role; additional details from the original Substack post are missing.

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Sources

• IGN: “All-Star Superman Writer Grant Morrison Delivers His Verdict on Supergirl and Jason Momoa's Lobo”