All I know for sure is...apparently the Spanish version of "Gonna Be My Day" is kind of a bop!
Also, Zipp has a little theme park style ride in "Hasbro City" wherever that is. Looks like one of those kid zones you'd find in a mall.
The thing is, I COULD see Hasbro having the G4 characters at least pop up a little more in Tell Your Tale or something in 2025.
For those who don't know, apparently Hasbro shared ownership with Friendship is Magic with The Hub/Discovery Family Channel. So, Hasbro wasn't the sole owners of the G4 cast, which is why they didn't show up very much in G5. If the G4 cast showed up in something, Hasbro would have to pay a usage fee to Discovery Family/Warner Bros.
According to comments on Equestria Daily, that contract expires in 2025, though. Meaning that Hasbro MIGHT have the full rights to the characters back. Which means they might be more willing to use them more.
So, I could totally see Season 3 of Tell Your Tale having some time-travel shenanigans, so that G4 and G5 can explore each other's worlds a little more.
So, if I were to bet on ANYTHING coming from this, it's probably just crossovers.
...Or not. This is all based on a random commentor knowing the specifics of a private contract between two corporations. So, take it with a grain of salt.
So, yeah. This may very well turn out to be a big ball of nothing. But, it seemed like news worth sharing, one way or another.