Why not just try going to the box office to see if they can sell them....they don't need to know if you won lotto or not..unless someone who ran lotto remembers you winning...just don't say anything..and ask if they can do something with them, sell them for you.
It's been done at Lion King, JoeKV said, and also I have seen it done for Jersey Boys too. [there was a couple on cancellation line in front of me and the box office said that they had 2 tickets that they were selling for a person and they'd have to pay in cash for the tickets] If the box offices at Jersey Boys and Lion King do that, I'm sure Wicked would...and its worth a try.
And on the other hand, 5th row is probably a very good view so you could always just not waste your time waiting on Wicked Lotto with so many people and a slim chance of winning, and just keep those seats.
Come on babe we're gonna paint the town...and all that jazz...