You have to purchase it if you want freight activities with the new rolling stock / Loco on that route.
Recent Loco DLC was at 13,99€. So i would expect this pack to be between 13,99€ and 19,99€. But i can be wrong with my guess there of course.
But not if you dont own TVL. So i think it goes more into the 19,99 direction but we will probably see it next week.