>>12213967Hard to say, the reason they "had to" make B2/W2 and have it be a little more different from the original versions (compared to previous additions like Emerald etc.) was because Nintendo (?) demanded something special if they want to put another Edition on the DS instead of the 3DS. With that argument out of the way, Z alone may be enough.
Then again,
>>12213976 has a point, too.
But the X-Y-Z combo is too good to pass. So how about Pokémon
Z1 and Z2?