i think not end but just hiatus for next years,but the problem fandom has down because hater and drama still annoying for wait to kill fandom and someone not understand about story.
Decade in the future.
My grandchildren : Hey granpa, why are you wearing this weird cartoon pony costume in this picture.
Me :( Sigh happily ), My grandson and grand daughter, there is the time where a show for little girls called My little Pony: Friendship is magic change my life. First I don’t believe it. In fact that’s how I met your grandma.
Grandchildren : Really!!!, can we here that story.
Me : It all started when I was a teenager, my friend challenge me to watch this show…..
Well of course the fandom will last after FiM. I mean if it’s anything like the Star Trek fandom (one that comes to mind) when the Original Series ended, I’d say the fandom will last. Hell maybe when the next generation comes by, maybe there’ll be more for us to consume if the strange success of MLP is anything.