The whole idea of the Collector Box was to have something physical to have and keep the trading cards, the album, and other items (depending on the pledge) way before 2019, date when the game is going to be release.
It seemed cool not having you to wait until next year to get the items with the possibility of just download the game, and most people don't use DVD anymore. ..
By the same token I put the shipping cost to the minimum. That's also a big part of the deal.
After being asked for a DVD no matter what, I did my homework and I had to offer it as an add on.
This is valid for the $65, $120, $140 and higher.
In case you want to change the T-Shirt for the DVD (pledges that includes the T-Shirt obviously) we can arrange that and there's no need to add the $15 extra.
Hope this helps! :)