I have been thinking about this for a while now. Wondering why Bethesda and ZOS are or seem to be trying to write out/play down the Morag Tongs role in the Elder Scrolls series as a whole. Now I know some people like the Dark Brotherhood but I find them to be very comical and I honestly can not take them seriously as a guild of assassins. Their devotion to the Night Mother and Sithis is bordering on the near Monty Python side of comedy for me.
The Tong on the other hand has more mystery to it and seems a lot more deadly and effective in what it does. They do not rely on the whims of a skeleton or a single person called a Listener who could be compromised and put out his or her own death sentences as they see fit. The Tongs structure seems more robust than that of the Dark Brotherhood as well.
As a long time fan of the Dunmer race my thoughts on this maybe biased towards the Tong. but I hope that ZOS realize that in the time period of the game TESO the Morag Tong is a force to be feared and should be a playable faction in Morrowind as they did drive out the Dark Brotherhood and it would not be in keeping with the lore if ZOS put the Brotherhood inside of Morrowinds boarders instead of the Tong.
So would it be possible to have a choice between the Morag Tong and the Dark Brotherhood when their factions get released?