Did you buy standard or deluxe? You don't get silver just like that. If you bought standard, you will have the next season unlocked directly. You only get silver if you already own all 4 of the seasons for this year. If not, it will automaticly count for the next season. Check in the eververse store, how many seasons are unlocked.
Good info! I'm not sure where to look for this info. When I check the DLC tab I only see the expansions and the year one seasons. Undying isn't even listed :(