Your opinion on these new enemies and bosses....

[MacIronhawk]

So here are my questions.
It seems as though the devs put in the print mailer and front page of the site that new enemies and bosses will be coming.
The enemies will have that yellow or orange skull right?
So what levels do you think they'll be?
What will they look like?
When do you think they'll be out?
If there's only a few then wont it be hard to fight them if so many people come on to see/battle them?

So please give me your opinions and try to answer the questions.
I would like to see what people have to say about these new enemies than just me.