That name makes me want to vomit.
"Hrm.. What can we do for our next expansion. We've got dragons and mythological beasts.. Paladins and Necromancers.. THAT'S IT! WE'RE MISSING NINJAS!"
What a random thought. They're clearly out of relevant ideas, and this is a pitiful attempt to hide it.
*EDIT: I just had to laugh hysterically when I saw this:
Is it just me, or do those look like they're images pasted onto the screen? Heh.
And now that I look at some of the ideas and such, they've got some really cool concepts. Mirror images, new actually inventive creatures... but they've gone about it totally wrong with this theme, in my opinion.