This is not the true successor.
There's two modes, Legend Mode and Dream Mode, let's cover the former first. It's an extended redux of sorts of the previous game's Legend Mode, covering the Raoh, Shura and Final arcs from the series. 'More' is not always better, case in point, Shura is the worst thing to ever happen to Hokuto no Ken. Us fans have a saying 'What happened at Shura stays at Shura', it's a mess full of plot holes and stupidity. And Hokuto no Ken is filled with ridiculous, sometimes even stupid stuff, but it's good stupid, while Shura is just dumb stupid. I could've sword that Koei said that they would rewrite Shura alongside Ohara and Buronson, but its the same mess it's always been, with one of the stupidest things to happen to Rin, where she is basically turned from a badass into an object. 'Hah! I pressed this pressure point that will make her fall in love with whoever she sees first!' and then a couple of guys take turns 'She must see Kenshiro!', 'Nah, you keep her, I got better stuff to do.', etc, etc. God, I hate Shura.
Then there's 'Dream Mode' where each of the 20 characters get about 8 stages each(To be fair, some are repeated) alongside a what-if story(Told via those awful manga-like cutscenes). And... I couldn't take it. I played 5 stages with Ryuga before calling it quits and uninstalling the game. But why is it so bad? Warriors games, even those based around capture points, like the Gundam DW games, always pepper the stages with moving enemies and allies, so that it feels like a battle. Here it's you and the bases. There's no moving enemies, although every now and then an enemy commander will spawn and chase you(While not even bothering with the bases), and sometimes you'll get allies. Oh, and capturing bases makes allied NPC fodder arrive. But where's the moving enemy fodder? It's so dull, boring... Lifeless. I've never, ever had had so little fun with a Warriors game. I clocked about 60 hours, and even got the Platinum Trophy, on the previous game. I clocked over 120 hours on DW: Gundam 3, which I platinum'd as well, not to mention all the other Warriors games I've played, to say that I love the franchise is an understatement. But Ken's Rage 2 gravitated between being a chore and being a bore.
The way you level up your stats has also changed, while the previous game had the Meridian Chart, which I really liked, now you must collect scrolls and equip up to five of them. It's... it's not a terrible idea, but it pales in comparison to the Meridian Charts. Special Moves also work a bit differently, previously, after executing it, the game would freeze and show you multiple camera angles, while your character said the name of the technique. It was very accurate to the anime, and look really badass. Now... they work as in any other Dynasty Warriors game, without the extra fanfare, which is disappointing to say the least.
Ken's Rage 2 is a mess. And it's a shame, because they actually improved on the combat elements, but due to its restrictive, messy nature, these changes never get the chance to shine. And it's hilarious, because in Japan it was named 'Shin Hokuto Musou', 'True Hokuto Musou'. Because it was supposed to improve upon the previous game. And the saddest part? If they had kept how the previous Legend Mode worked, how the previous Dream Mode worked, they could've had something really, really good. But they decided to fix what wasn't broken.
2.5 out of 10