#2 A top free agent may make their AEW debut
Proceeding with the idea of the previous point, AEW may try to gain more emphasis by the debut of a prime free agent of the industry.
The debuts of former WWE stars Bray Wyatt and Braun Strowman shall fascinate a large portion of the audience and attract ample interest. This could instantly trend on social media as well, turning eyes toward the company.
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The new signee does not have to be Wyatt or Strowman. AEW can open the forbidden door to debut an NJPW talent or another professional wrestler. The likes of Will Ospreay and El Phantasmo would be good choices.
#1 Impact Wrestling talents appear in AEW
To make the first 30 minutes of Rampage unforgettable, AEW may decide to let Impact Wrestling lead an invasion of sorts by attacking the stars in the ring.
This does not have to be a full-fledged invasion. Multiple members of the promotion's roster are feuding with Impact Wrestling talent at the moment, and they can play off that equation to execute the moment.
The long-term impact of such a move is questionable, but one promotion invading another will inevitably garner notoriety and shift eyes toward AEW.