4 (John Silver) of The Dark Order made the announcement on Twitter this afternoon. His post was re-tweeted by the official AEW account.
"10 is gonna destroy Orange Cassidy! #JoinDarkOrder," 4 wrote.
Stay tuned for updates on Wednesday's Dynamite on TNT episode. Below is the updated line-up, along with 4's full tweet:
* Orange Cassidy vs. 10 of The Dark Order
* Chris Jericho vs. Isiah Kassidy
* Ricky Starks vs. Darby Allin
* Britt Baker will be in action
* AEW World Champion Jon Moxley will appear live
* Cody Rhodes responds to the recent challenge from AEW TNT Champion Brodie Lee
* AEW World Tag Team Champions FTR will defend against SCU