I'm pretty sure that no one was watching undisputed 2 and 3 for the plot, it just provides the scaffolding for the fights. Undisputed 4 is the same, though some could argue that there's too much plot. Nevertheless, there's ample fighting and Adkin's throws in some of the lines that we've all come to love from Boyka as well as the moves.
If you're not into fighting movies then this should obviously be a movie that you shouldn't be watching. For people who are, we generally don't mind the "plot scaffolding" they throw around the movie as long as the fights are good and they are. My only slight complaint if you could call it that is that Boyka is a more remorseful character in this film and IMHO Adkin's kills the role more when he's just the badass who cares about nothing else excepting being "the most complete fighter in the world."
If you're not into fighting movies then this should obviously be a movie that you shouldn't be watching. For people who are, we generally don't mind the "plot scaffolding" they throw around the movie as long as the fights are good and they are. My only slight complaint if you could call it that is that Boyka is a more remorseful character in this film and IMHO Adkin's kills the role more when he's just the badass who cares about nothing else excepting being "the most complete fighter in the world."