The 18-year old is yet to make his first-grade debut but is highly rated amongst NRL circles, currently contracted at the Eels until the end of the 2020 season.
It is understood that the Warriors are keen to extend Brown’s contract beyond next season.
Johnson demanded a release from the Warriors on Wednesday following uncertainty surrounding his long-term future at the club, and is believed to be close to signing a one-year deal with the Cronulla Sharks.
Brown has built up the reputation as a strong defensive leader and was identified by Warriors recruitment manager Peter O’Sullivan as a suitable replacement for Johnson.
Following Johnson’s release, the cashed up Warriors are still exploring all their options, with emerging Cowboy Te Maire Martin in their sights, as well as other potential big-name half that may fall onto the market.