It looks like we can expect some pony parody ridiculous on this coming Monday. They actually did one a while back with Cowboys and Aliens that was actually pretty well made, so I'm looking forward to this one.
I can't really see Twilight Sparkle taking a warhorse role... maybe Applejack or Big Mac.
And I bet 25 cents we will see a Derpy.
Check out Tara's Twitter page for the source!