WWE Hall of Famer Billy Gunn made an unexpected appearance for AEW during the battle royal on last week's edition of Dynamite, and his old employer apparently isn't taking it so well.

According to a report from Fightful Select (h/t Ringside News), WWE was quite disgruntled to see Gunn appear on AEW programming. More specifically, there was "displeasure among WWE "with the fact that his old ring name was featured on Dynamite.

Gunn signed with the AEW promotion earlier this year, and Triple H made a strong remark about it during the D-Generation X Hall of Fame induction ceremony. Now, there's this whole saga that has seemingly agitated Vince McMahon and other WWE officials even more.

AEW announced a Bash at the Beach event on Jan. 15, 2020. However, it's being speculated that WWE could be suing them over a copyright/trademark infringement. Whether or not this actually takes place remains to be seen.

The AEW promotion is made up largely of former WWE talents, namely Gunn, Cody Rhodes, Chris Jericho, Jon Moxley (known as Dean Ambrose in WWE), Pac (previously known as Neville), and long-time play-by-play man Jim Ross.

Related: Billy Gunn Makes Surprise Appearance During Dynamite Dozen Battle Royal

The Wednesday Night Wars have been a one-sided affair thus far, with Dynamite defeating NXT in ratings on each instance up until last week, with Triple H's brand finally scoring its first victory - which led to quite the troll job from Chris Jericho.

Back in the '90s, WCW and WWE stole talent from one another, and both companies went great lengths to try and weaken the opposition's product. Bringing Gunn on television last week was a big move by AEW, and we'll find out soon enough if WWE has a response for it in short time.

The WWE-AEW War Is Intensifying By The Day

WWE and AEW took the occasional shot at each other in the early going, but now things are really starting to grow. AEW officials must have figured that bringing Gunn on television would draw the ire of WWE, and it appeared to work. This gives Cody, Jericho and the Khan family good reason to try and find more ways to agitate WWE going forward. We'll just have to wait to see what happens next as the war continues to grow.

Next: Seth Rollins Calls CM Punk A Coward For His WWE Backstage Comments