May be difficult, those packs are really not designed to be larger than 48V 14ah. Definitely would be difficult to squeeze a large capacity 52V system in there unless much more expensive battery technology is used.
@dpw yup I've tried the display, didn't get too much time to play with it but I'd assume there are some nice features.
For the controller I'd take a look at how big it is to see if it fits within the frame of the Boar. May be interesting to get customization with the bike