While the toy above will definitely be there, and Hasbro will most likely be displaying their offerings as usual, My Little Pony will apparently not be rockin an official panel this year at SDCC. Their current, freshly released schedule doesn't list it at all for the 4 days.
While hasbro doesn't exclusively reveal stuff at SDCC for upcoming show content, it's usually one of their big ones. It's possible their next in-house event will be where we see
In other news, there still is an fandom-run My Little Pony panel though, which you can find the details on below.
Fandom of My Little Pony: Friendship Is Magic. Beginning of the End?San Diego, California - 7 July 2019 - Yesterday, Comic-Con International released their program schedule for Saturday 20 July. Out of the many panels that were announced, there is one whose subject is the fandom of My Little Pony: Friendship is Magic. The panel will be held at the San Diego Marriott Marquis & Marina, in Grand 10 & 11, on Saturday 20 July 2019, at 8:00 PM. Panelists will include but not limited to representatives of BABSCon and EFNW, and current and former members of the fandom such as ACRaceBest. A link to the panel information: https://comiccon2019.sched.com/event/ Rri8/fandom-of-my-little-pony- friendship-is-magic-beginning- of-the-end After the panel, join your fellow bronies for SoCal Bronies' monthly San Diego meetup. It will also occur within the San Diego Marriott Marquis & Marina, at its Marina Kitchen Restaurant & Bar. This is a no host event meant for those +21; thus everyone is expected to pay for their own food and libations. A link to the meetup information: http://meetu.ps/e/GPg43/xpZv/d
Thanks to Jordan for the heads up.