Along with mysterious autographed cards.
Upper Deck announced via email, their 2016 Goodwin Champions trading card series is "coming soon" to e-Pack. That series was already released in stores on July 13, 2016.
Exclusive to the e-Pack release is Royal Red parallels and achievement cards (including autographed cards).
2016 Goodwin Champions features 65 cut signatures that's serial numbered 1/1. It's going to be interesting to find out which of those cards Upper Deck reserved for their e-Pack release?
October 2, 2016 update: That series is scheduled to be releaed on e-Pack on October 5, 2016.