And more time travel!

3957701 Sounds like a good start.
Now, personality:
The one that was packaged with Pinkie probably has a cheerful demeanor like our party pony. The one packaged with Fluttershy would probably be quieter and more serious.

3957731 Hmm, so far from what I've seen of this model of toys, where they sell a princess with one of the mane six. They tend to sell them with ponies who have opposite personalities, probably to balance them out. Like Pinkie and Celestia, or Luna and Rarity. So these new princess's could have opposite personality's then their paired toy. "But this is just speculation, they could just have completely unique personalities, that don't conform to traditional arch types...right?"

3958494 Actually, I think the back of the box specifically said Pinkie's princess liked parties and stuff.
And yes, I wonder what new personalities they have.

3957701 Possible G5 design?