Considering NGP subs current has 1 EU game, 0 NA games and only really JP games, I would consider possibly only having 1 sub for NGP.
For New Nintendo 3DS physical, how many actual game titles are we talking about here? Besides Xenoblade Chronicles, I found Runbow Pocket in NA. If the total number is low, I would consider creating a single category for New 3DS physical and using TLD on entries.
For New 3DS digital, i'm presuming we already have all of the entries existing in the 3DS eshop categories.
For DSi, I would likely prefer to drop the TLD on the existing sub