Yes, they have made contracts with DC Comics and Marvel to make sets of various superheros such as Wolverine and Iron Man.
they just made one with other superheroes. go to lego.com and check it out
Lego marvel superheroes get released on March 2012 in Australia.
Dc superheroes
Yes... looks like LEGO Superheroes will be coming out soon. I saw a superman LEGO guy on the LEGO site recently... not to buy yet, but should be soon.
The new superheroes in Lego batman 2 dc superheroes include Lego batman, robin, superman, green lantern, wonderwoman, and others, most likely including bat woman and night wing .
The Lego company has stopped making Lego batman but you can still buy them at amazon. As of 2012, Lego also started a DC Superheroes and Super-villains theme. The link can be found below. You'll find some Batman sets ;)
It is on Amazon already!
Magneto
Yes
I know nothing about Lego Marvel Superheroes specifically, but based on my cursory knowledge of Marvel in general, I'm pretty confident it's Magneto.
There are several videos on YouTube that will explain to you how to unlock Black Adam in the game LEGO Batman 2DC Superheroes. These videos will teach you many of the tricks that will make you successful in playing the game.
No they do not make Knex.