It's clear that they're punting that way, or something very close to it, between the HUB's promos for season 3 (that line about a pony discovering her true destiny) and the implication of the season 3 opener tying Twilight more closely to Celestia and Luna.
The only problem is i could see that potentially be a bad idea from a toy perspective as much as a good one. I'm assuming that the target market is meant to sympathize with Twilight as a sort of plain-jane everygirl (but with the requisite special talents for a fantasy series protagonist, like Harry Potter, who managed to pull off "sympathetic average kid who is secret wizard quite well) who's just trying to do well in school and make friends. Making her a Princess would be ideal for a little girl's fantasy wish-fulfillment perspective, but also break the believability factor, and shatter the underlying theme of the franchise as that would drop one great hell of a barrier between Twilight and the other Manes.
On the other hand, however, the writers could play into it, and make a more drama-focused season four, where the entire myth arc is similar to the lesson of "Sweet and Elite" making the whole thing about Twilight's struggle to not grow apart from her friends due to her new status, so who's to say?
It's all about execution.
No more Derpy sucks ass, but that was to be expected. As much as i'm about political correctness, i do feel that comedy shows should get more leeway in that regard.