This indestructible franchise keeps adding new (very appealing) blood, and they keep selling tickets. This particular cast is noteworthy because of the quality of this new blood. Unfortunately, in my opinion, this is the most noteworthy part of this one: the script isn't particularly strong, the Computer Generated blowie uppie stuff is endless and the effort to exceed the previous episode is strained. Furthermore, this PG-13 outing is over two hours long, so watch your liquid intake.
In a nutshell, someone must travel back in time to prevent the origin of the creatures that are destroying mankind (and Mutants) in the opening (endlessly) violent sequence. This one really does start with a BANG!
I could keep going because the list is endless, but you get the idea. In my opinion, there isn't much more to say; each character has his or her "moment" to shine and we know Good will prevail, so it's just a matter of watching all that nicely crafted blowie uppie stuff until it does. Yawn...