I am looking as well. I emailed the ticket staff and they said on Feb 3 there will be some upgrades thrown in for sale, using the ones that people cancelled. The upgrades require you to already have a standard badge.
Undercover Steve Rogers - Captain America. (Awesome Con 2017)
Xe Yui/Lord Grim - The King's Avatar (TBD)
All Might - My Hero Academia (Katsucon 2018)
Lt. Armstrong - FMAB (Katsucon 2018)