>>12779593There are actually a few wrestlers who have gone between WWE and AEW since AEW began:
1. Jon Moxley (formerly known as Dean Ambrose in WWE) signed with AEW in 2019, but later worked with WWE again in 2020 as part of their COVID-19 era shows.
2. FTR (formerly known as The Revival in WWE) left WWE in 2020 and signed with AEW, but later appeared in a segment on WWE NXT in 2021.
3. Matt Cardona (formerly known as Zack Ryder in WWE) debuted with AEW in 2020 and had a short stint with the company before returning to WWE for a brief appearance at the Royal Rumble in 2021.
4. Rusev (now known as Miro) was granted his release from WWE in 2020 and later signed with AEW, but has since returned to WWE and is currently competing on Monday Night Raw.
These are just a few examples, but there have been others who have worked for both companies at various points in time.