Well I had to make the great decision last night. I was off to the cinema because it was was hot and I have a subscription pass I'm trying to get the most out of for the last week it will be active. I actually went out thinking both movies weren't out for another day and that I was going to see Indiana Jones again. But, checking my phone as I got in the car, I learned that not only was it, in fact, Barbieheimer eve, but that both had showings starting at 8pm, right when I would arrive. I had never thought the great decision would confront me this bluntly.
En route, I Melt with You by Modern English came on the radio. My initial thought was, it's appropriate music to go see something light and poppy... but just as I was thinking "okay, it's a Barbie night" I remembered the songwriters' claim that the song is actually about dying in a nuclear holocaust... which obviously is a more appropriate going-to-see-Oppenheimer musical theme, but... well even if the song is about that (the lyrics can support that reading) it's clearly taking the form of romantic pop songs not about that. Inconclusive.
Upon arriving at the theater I had decided on Oppenheimer simply because there are fewer showings of the longer movie and I happened to be arriving right on time for one, but then I noticed that the multiplex in general was packed, and whereas a comedy is improved by a packed house, drama I'd rather not deal with that scene. So Barbie it was.
And yes, times did line up to make the Barbieheimer double feature option feasible, but double features were a thing in an era when movies ran shorter. I wasn't going to do a 5 hour movie marathon and get home at 1:30 in the morning just for the meme's sake. So... Oppenheimer next week.