There's an introduction of a lot of new types of enemies, particularly within the Red Legion. (thatvideogameblog.com)
Adventure mode is the big addition here and pits you against new types of enemy mixes in a never - ending quest. (wolfsgamingblog.com)
There are also new types of enemies that require multiple hits to take down or can combine to make a larger baddie that is harder to hit. (nintendoworldreport.com)