I am a Nepali with Tibetan origins, so really i am biased, but there is a heavy lacking in alternatehistory regarding the Himalayan Region. All the Nepali tls (3) are written by me in this site, and i have seen exactly 0 Tibetan Tls and 1 Bhutanese Tl in this site. So really - Nepal, Bhutan, Sikkim and Tibet need to get a lot of love! Their histories are so fascinating that i am shocked that many do not know about the great indo-sinitic trade that they controlled for two and a half millennia.
Also basically any Timeline about India or China from 500 AD - 1800 AD.