From what I recall of previous episodes they focused heavily on the creation of each toy brand and the people involved with it, not so much on fandom stuff (though the He-man one talked a bit about the adult fanbase, mainly because they're the only ones invested in the franchise these days). Will be disappointing if the MLP ep is any different.
Really tiresome to still hear "Adult men watching a show for little girls???? SO WEIRD!!!
" in 2019, but at least the trailer had mostly G1 stuff so hopefully that bodes well. Of course G4 is also a very important part of the brand's history so I don't mind it being there, just hope it doesn't take up too much of the episode.