Confirmed - 3 new countries to be added
Currently, if you go to "Choose Store" on iTMS, you get a display with all the flags of the current iTMS countries. There are 15, displayed as 5 rows x 3 columns.
Apple is rumoured to add Australia - making 16 countries. This can be displayed as 4x4 - though everything has to shrink a bit to fit 4 across. 8 x 2 or 2 x 8 will not look pleasing to the eye, and require scrolling, or really small fonts.
Apple is rumoured to add Norway - making 17 countries. You can't make a symmetrical grid from that, so the "Choose Store" page won't look as pleasing to the eye. No way!
So, Apple has to add a third store. That makes 18 countries. 6 rows x 3 columns.
QED.
Ideally that third store should be Japan. There is a serious lack of Asian content in the iTMS (like - none), and Japan is a very big market for Apple. But no rumours of Japan, so this is unlikely.
I really wish Apple could organise things so we could buy from any country. Once we get the Australian iTMS, that will be great. But I would love to be able to buy J-Pop stuff from the Japanese iTMS rather than having to import CDs from Japan.
