HITC Sport understands the Watford striker is set for a Spain loan.
Isaac Success is reportedly free to leave Watford and West Ham could reignite previous interest.
Sheffield Wednesday were linked with a move for the Watford winger in August.
Hull are looking to sign Watford youngster Isaac Success on loan but should Aston Villa be competing for his signature?
Aston Villa looking for a new striker to sort out "toothless" attack, could any of these Bournemouth, Liverpool, Southampton or Watford stars do the job?
Watford are said to be lining up Liverpool midfielder Lazar Markovic, but will this open the door to the likes of West Ham for another Hornets winger?
West Ham United are allegedly keen on Watford's Isaac Success.
West Ham United have been linked with a move for Watford's Nigerian striker Isaac Success.
Watford's Isaac Success could pursue a summer move away, with West Ham allegedly keen.
Watford snuck past hosts Middlesbrough on Sunday afternoon after a 1-0 win.