There's no need to revive anything. This is a perfectly normal sized fanbase now.

I don't understand I've seen so many people on this board talk about how G5 is bad and how it's not popular so Hasbro is so worried and stuff about "fans". And, I don't like bringing age into this, but, do people who grew up with MLP now think that FiM is what MLP is?
G5 is My Little Pony. And it's very successful I'm sure, My Little Pony toys sales are probably doing just fine. My Little Pony is NOT a TV series to have fans. FiM was an accident, one that Hasbro began to correct immediately after season 1. There is no sequel to FiM, EVER. so the age of bronies will fade away and be forgotten about and My Little Pony will continue to be what it is, like Bratz dolls or Littlest Pet Shop or whatever trash. No one wants to watch G5 because it's exactly what Hasbro wants it to be, My Little Pony. It's loved by impressionable little girls I'm sure. For little girls generic stuff is good enough.
And thinking Hasbro should make good shows instead with MLP, maybe they would make more money that way, but Hasbro is super rich doing what they have been doing they're not going to take a risk.

There's nothing more that can happen. Until AI allows people to generate entire new FiM episodes but once AI is that good the whole entertainment industry and society will explode and we'll all be dead anyway.