I remember pointing out on Fillychanthread that almost all Fillys had different poses, especially when compared to FiM blindbags. And every Filly looking like different Fillys is a good thing, after all!
The first thing that struck me when I pondered about the recolours was in fact Super Smash Bros. Brawl. But I will now assume that Sakurai's successor as the Smash director, have some unusual wishes for new characters in SSB5!
SSB4 introduced Miis, and I do have Will as a Mii fighter (who often ends up lagging behind Michael de Santa and Snorlax), but the potential for making all that many more Filly SSB Miis isn't quite there.