I had mentioned this on the other Edexcel Psychology topic, but feel relatively sure that Watson and Rayner (Little Albert) will come up in the exam; possibly as the 12 mark question, if not then I'd at least expect it as a smaller question. It has never been on any of the exams before, so I think its presence is quite overdue :P I'll be surprised if it doesn't come up.
Although, here are my other predictions for the exam:
Defence Mechanisms
Key Issue (Learning Approach)
Case Studies
Psychodynamic Practical
Twin & Adoption Studies
Social Learning Theory
Psychodynamic explanation of gender development (if comparison, then I assume the Biological Approach)
Of course, these are just assumptions - still going to revise everything thoroughly for the exam aha.