While Funko has seemingly gone silent on their primary lineup of pony figures, they still continue to expand their side sections. A new listing over on Toywiz seems to hint at an upcoming Power Ponies themed set in their Mystery Minis lineup.
Outside of that, we have absolutely no information on it. For a refresher on what Mystery Minis actually are, see subject A and B below:
Hopefully information on this releases soon! Maybe at their SDCC booth this weekend?
Thanks to Sharon for sending it.