Rovers booked their place at Wembley after a 5-1 semi-final second leg thrashing of Southend United, but O'Driscoll still believes his side are underdogs to reach the Championship.
"The job is still half-done and now we have to try and finish it against a very good Leeds team," he said.
"It depends on what Leeds do about being favourites. I don't think (manager) Gary McAllister will be putting that message to his players.
"We'll both be prepared and we've both got one foot in the door of the Championship. But only one of us is going through and we have to do our best to make sure it's us."