Likely there will be some speculation on Rebellion later down the line and there are also the packs held by the DAO. Also, eventually Rebelling will be relegated to Modern which is sure to totally crush the prices of the cards. The issue however will remain that Modern is going to be super expensive to get into while for Wild it's way cheaper and it should always be the other way around. Unless they find a way to keep cards scarce holding their value the game won't go anywhere.