In Lightning Returns: Final Fantasy XIII, you do not have Paradigms to shift into. Instead, you create various “Styles” that you switch during combat, each style comprising of a weapon, a shield, accessories and abilities you set beforehand.
The new combat system with Styles does not have an official name yet, but is tentatively called “Amazing ATB (temporary name)”.
Apparently it’s called that because the new combat system is basically derived from the classic Active Time Battle system, except now you take direct control of your character in terms of movement and pressing buttons for commands.
Square Enix is also stressing that, unlike Final Fantasy XIII-2, this time around the story will be complete within the confines of what’s on the game retail package, meaning you won’t have to buy DLC to see the end of the story.
They're also promising that fans of characters from the previous FF13 games will be happy with those characters’ stories in this new title, that loose ends will be tied up.