The athletic centre half, who came through Arsenal’s academy, has flourished in League One with the Dons.
Blackburn Rovers and Barnsley are two sides believed to be weighing up a move for the 25-year-old. Sunderland are also keeping tabs on his situation.
Thomas is set to leave Wimbledon on a free transfer after running his contract down.
The former Charlton and Wigan Athletic man has not played since January after being hospitalised with pneumonia.