Take a look at the following language map for Asia, you can clearly see the individual civs in East Asia and South India. For the selection of further civs in Asia, specifically in the East Asian and Indian regions, Microsoft and the devs can choose well here.
I agree with these 3, but I think there are far better candidates for the other 2, like the Khitan, Tanguts, Chams, Javanese or Sogdians, just to give a few examples.
I think it is true. According to my knowledge, Old or Common Turkic emerged in what is the east of todays Kazakhstan and north and east of it in the year 400 AD and lasted until around the year 750 AD. Around this time it split out into Kipchat and Oghuz, both of which are correctly shown on the map around the year 1000 AD.
But yes, I also like the graphic representation of the early Turkic languages.
I am curious to see, how many DLCs will still come to the game and what the content will be.
For further DLCs related to new civs, i hope, that Microsoft will go for next to East Asia and then to India again. Then together to North Africa and Near East and further to Central Asia. At a minimum, I would like to have 1 to 2 Turkic civs more in the game alongside the Turks, Cumans and Tatars, that we already have.
The map has exaggerated the spread of Telugus too much. The map has been made by u/JG_Online for Dravidology sub-reddit so there seems some bias. The telugus migrated south and north mostly during the vadugan migration (early 16th century).