Burgess: Hoping to start
With Paul Dickov's loan spell from Manchester City over, Seasiders boss Simon Grayson will choose between Burgess and Morrell as partner to Steve McPhee.
Midfielder Gary Taylor-Fletcher, whose heavily pregnant wife has yet to give birth, is expected to be available.
The Seasiders lie just two points above the relegation zone and need a point against the Hornets to be mathematically certain of staying up because of their far superior goal difference.
Grayson will not tell his out-of-contract players their fate until after the game.
Six of Grayson's squad are out of contract and several more are waiting to hear if the club wishes to take up an option at the end of their current deals.
Kick-off at Bloomfield Road on Sunday is at 2pm.