Hmm yeah I don't see anything "timeline" in the title..
To me this sounds most like
Pony Origins -- Saturday 11:30 AM in Mane Hall "Join My Little Pony series creators Lauren Faust and Bonnie Zacherle as they explore and discuss the birth and development of MLP over time."
but there's also
History of My Little Pony: A Look at the Other Generations -- Sunday 3:00 PM in Hall of the Stars "Hear all about Hasbro's struggles, strange decisions, successes, and where they went wrong in an informative historical discussion of the MLP toy line."
not quite time-line-y, it sounds like it's going to be a neat panel, I have this one on my sched I want to see;
Bonnie Zacherle: Stories and Experiences -- Sunday 12:30 PM in Hall of the Sun " Join the original My Little Pony creator Bonnie Zacherle as she discusses how the world of MLP was created originally and where it lead her."
again not time-line-y at all, but a neat piece of history of the beginnings of pony, conflicts with Ponies Anthology 7 for me;
Present at the Creation: Promoting the Original My Little Pony Series -- Saturday 5:30 PM in Hall of the Moon "Enjoy rare behind-the-scenes videos promoting the original My Little Pony series. See Tony Randall and Sandy Duncan recording their lines for the Rescue from Midnight Castle special as producer Joe Strike shares his experiences helping introduce MLP to the world."
also might be time-line-y but not with the show itself though;
The History of BronyPalooza -- Friday at 5:45 PM in Hall of the Sun