Here are my feelings on the battery layout. These are just my feelings, not hints or clues or anything, but it's been a hot topic of internal discussion for a while...
4+2 - not my cup of tea, but would look interesting.
Saddle Pack - I'm kinda neutral about this. Don't mind it, but saddle lipos haven't really "arrived" just yet, and the market is small (but growing).
Stick Pack - I'm intrigued if the car can be made to function well AND give the user a stick pack option. Opens up all kinds of yummy goodness for lipo options right off the bat, and I'm all about lipo options!