https://en.wikipedia.org/wiki/It%27s_Pony but this is the second horse related show on Nick. This one just came out too. Why horse all of the sudden? Could it really have some connection to FiM after so long? I'm not sure I'd go that far and say that but I do wonder if FiM could play a part do to this:
https://www.equestriadaily.com/2015/12/nickelodeon-partners-with-hasbro-for.html They did partner once. In fact it was theorized that Hasbro was considering Nick as a backup option do to uncertainty with The Hub/Discovery Kids. It wouldn't surprise me if Hasbro had some back room talks with them that planted the seed for them looking at this now.
