In the episode "Dragon Dropped", we get a glimpse of these Power Ponies:

Any ideas or opinions on these new additions?

7010651
They look interesting, though I'm a bit more curious as to the powers that they possess or who they are.

That and I wonder why two out of the three of them are alicorns. You know, considering that alicorns in general are rare

7010803
Maybe the comic series was turned over to a new head writer who just can't resist putting more and more alicorns in!

7010807
Or perhaps it's one of those transformational abilities where somepony transforms into an alicorn. Kind of like Shazam from DC?