We might have a composer for the music of G5! At least on the movie front. Alan Schmuckler (Who's full credits you can find over on his website) has listed up the upcoming My Little Pony G5 Movie on Netflix as a project he both worked the lyrics and music for, and joining him is another musician Micheal Maher. We still haven't gotten much of a teaser, but considering Pipp seems to be all about the music, I'm sure it will be filled with it.
Thanks to Quentin and VcSaJen for the heads up.