As someone who wants Harrigan back, I do wonder how they are going to fit him in the game story wise. The excuse for Dutch being able to fight on the field alongside younger and more able soldiers is due to the experimentation of Predator DNA and medical tech. Harrigan 1997 is one thing seeing how Dutch 1989 is just handwaved as a skin, but Harrigan 2025 is another area entirely. I just don't see him accepting experimentation on him, judging by his character.