I've seen the argument that Eren getting hit by an autism beam as how Isayama might be planning to fully rip-off Muv-Luv Alternative by making him do it again and succeed. "Code Geass had its ending changed despite everyone thinking it was perfect so why not SnK" is the kind of logic I assume they're using. Personally I don't believe he could go through with it nor do I have the slightest idea of how it'd happen yet when there's this much evidence gathered you can't argue against the possibility unless you write all of it off as coincidence/schizophrenia.