This didn’t make sense to me.

Did Allen not realize Nolan was a viltrumite? Nolan implied that he threw Allen back into space last time. Allen wasn’t suspicious about how he got whooped? It’s unlikely that he knew, and flagged it, bc why would he come back for a routine review?

And even if Allen did realize it and flagged it, it wouldn’t make sense for him to screw up Urath and Earth, given that he remembered Nolan (“you shaved your mustache!”)