Michael Dudikoff continues in this 4th American Ninja movie. That doesn't mean they kicked out David Bradley, he is still the lead. Maybe they thought bringing the two 'American Ninjas' together would bring an extra dimension to the film, but that didn't happen at all. For that, Dudikoff and Bradley were almost not fighting together at all. I consider that a missed opportunity. What's worse, is that Steve James now is gone from the series. He was a crucial element in these movies. Without him, it's much worse. It really doesn't help that the fighting scenes are worse than ever, either. The definitely should've stopped this series after the third movie. Surprisingly enough, the also made "American Ninja 5". Beats me.
Review of American Ninja 4: The Annihilation
