According to the this sneak preview of the upcoming 100th MLP episode Derpy will not only appear but will actually talk.

Her new voice is so adorable.

MEGA AWESOME!!!

4424422 The horror! The horror!

4424422

I'm so happy I'm not the only one who noticed that Derpy's new voice is so freaking adorable

4424422
"Maybe it's just a friendship problem, and it'll all be cleared up in a half-an-hour or so."

I died.

Like, literally. I died.

That is the best line ever.

any word on Doctor whooves?

4424685 Yes, it shows him talking in another preview.

4424849 wasn't David tennant supposed to do a guest voice this season?

4425244 I have heard rumors of that but I don't know if it is true or not, they got John De Lancie who voiced Q from Star Trek who Discord is partially based on to actually be the voice of Discord so it wouldn't be entirely unprecedented if they got the voice of the current Doctor Who to voice Doctor Whooves.

the current doctor is peter capaldi lol but i swear there were rumors that tennant was gonna be in mlp

List of 3 AWESOME things happened:
-Octavia talked.
-Sparkler (or whatever her name is) talked.
Finally...
-DERPY spoke!!!!