Nikki Bella could be on the verge of returning to the wrestling ring -- TMZ Sports has learned the former WWE Superstar is in talks to make a potential comeback with the company.
A source close to Nikki -- who last appeared in the Royal Rumble in 2022 -- tells us conversations are, in fact, underway ... and she's already been training in case an agreement is made.
We're told this isn't a longstanding development .