From their announcement:
Due to manufacturing delays, Ticket to Ride India – Map Collection Vol. 2 will be available a little later than we previously expected.
In Europe, this new expansion for the Ticket to Ride series is expected to be on sale at game retailers the first half of December. The Days of Wonder web store in Europe will begin taking pre-orders on November 18.
In North America, Ticket to Ride India will be available in the first half of January. The US web store will begin taking pre-orders on December 8.