Just because a developer only makes licensed games should not instantly mean they are awful. I am really sick of seeing this kind of mentality.
But if this is anything like their 2D platformers, I fully expect heavy emphasis on close range combat. I am not ENTIRELY against that, but I would strongly prefer it to be designed like the classic "Run n gun" games.
Only thing that I find really unsettling about all of this is that it is 3DS. I am really hoping for another platform. Donkey Kong Country Returns showed that fully 2D games can do quite well on consoles, and in the case of New Super Mario Brothers Wii, can actually do better than many 3D ones. I also expect Sonic Generations to be the best selling console Sonic game this gen, so there is hope for Shinobi... RIGHT?!