Looks to me like scrapped song from the end of Rainbow Roadtrip special. Those two earthponies could be Petunia Petals and Mayor - the reason why there are hearts and rainbow.
I just added a leak tag just to let everyone know that this was leaked from that website where the same person from Boulder Media put it up!
Just giving you a heads up!
Also:
I am fascinated by that find off of that SlideShare website… Could very well be how the opening minutes of the G5 kick-off movie goes!
Look like the original slideshow depicts a song that is some sort of recap of FIM/G4 itself? The two ponies doing the singing also interact with the Mane 6 but only for the purpose of the song too. I say that cuz the beginning slides show that older looking pone cleaning toys of the Mane 6, which once the song kicks in, they turn living and soon the older pone and younger pone sing about the Mane 6?
I know that slideshow is to be taken a rumor but…I’m still a bit excitedly optimistic that could very well be a very early look at how the G5 movies transitions from the old guard to the new guard.