True story: I fell asleep on Saturday night and dreamed of this. I knew I had to draw it up properly.
There's something very strange about Hasbro's habits of color-swapping ponies we know very well to make "new" ponies for the toy line. It's never exactly convincing but it creates the strange idea that with a few changes of color ponies can create a new identity.
Twilight and Trixie, already linked, could simply paint themselves up as the other, change their mane styles and take the other girl's place, or become her twin - both of their eyes are purple. There's some intensely kinky tension there, especially for a mare as self-involved as Trixie. Of course, with Twilight looking like this, she's just found the mare of her dreams - herself and her greatest rival!
"Look, Trixie, I'm finally good enough for you!"
I love using markers to capture the color of this show. Between Twi and Trixie, my "sky blue" Primascolor is now dead. o.o