I noticed it too! The parallel could be intentional – seems like for WE they’ve looked at the past more than usual (for example there are the parts of songs – if I remember correctly one of them is the Lightning – taken from very old ideas, the Lightning methaphor itself and the Lightning drawing from the Funeral booklet, not to mention the themes of the album in general). Or maybe it’s just a subconscious thing, who knows. Artists tend to repeat themselves all the time after all, looking at the same concept from many different angles.

Anyway, whether intentional or not, the two songs do have some thematic similarities.

The Great Arcade Fire is a song about, I think, the end of innocence and the inevitability of watching the fire unfold, human nature and death. “The Great” before the two nouns depicts the fire as a fictious historical event (also the reason why the band name had the article in front of it at the beginning, I guess), one could think of it as something that happened some time in the past of the “Neighborhood”. The great fire being, kind of a Fall from Eden, an Exile from Arcadia (Arcadia apocalypse).

In Rabbit Hole as well, there’s a sense on inevitability, of falling through a deep and endless hole, the very long trip that is life, a labyrinth built by God, by Dedalus in the myth, by our fathers when we’re born…

God is sleeping, watching the world on tv, ignoring the the fire unfolding over his bed. Or the narrator is sleeping, he’s still young in his childhood bedroom with posters on the walls, and the fire is a sort of omen of future things, of future loss of innocence, like the Christmas tree burning in the other song.