According to this article CEO of Oman Air Paul Gregorowitsch said that after introducing Manchester and Nairobi into WY Network PEW might be the next following until the end of this year.
Actually either he or the author made a mistake while naming Peshawar as a City in Afghanistan.
Even with expansion more tentative, Oman Air has still added Nairobi and Manchester to its network this year, according to Gregorowitsch. Peshawar in Afghanistan could follow before the end of 2017, and addition next year include Hong Kong, Seoul and a city in South Africa, he said.