Rösler told the packed audience that a full back will arrive at Griffin Park on Friday in a season long loan.
He also spoke of his interest in Charlton Athletic striker Paul Hayes, who has been attracting press headlines recently as The Addicks look to move the 28-year-old on from The Valley.
You can find out who Brentford's new signing is by visiting the official Brentford FC website on Friday.
Exclusive highlights from the Fans Forum will be on Bees Player.