Rovers won 18-12 at home in July, backing up a 16-12 victory at Mount Pleasant in May.
Now Long is determined to complete the treble, with a place in the Kingstone Press Championship Grand Final at stake.
Bulldogs coach John Kear, who is without Johnny Campbell (suspended), insists Batley will be ready despite a grueling golden-point win over Leigh last week.
Kear said: “We’re feeling confident and good about ourselves. We’re playing some good rugby at the moment. We’ll be right, don’t worry.”
He added: “It’s great for the club. I feel really chuffed for all the directors and fans. We’ve just got to dust ourselves down and have a dig.”