i take no credit for the guide here is where it comes from
http://www.cheatcc.com/pc/sg/lego_batman_2_dc_super_her....txtSuper Hero at 40,000
Characters: Batman, Robin, Cyborg, Green Lantern, The Flash, Wonder Woman
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Walkthrough -
Robot Wreckage -
Two more heroes have joined your active party: Flash can run real fast and
assemble things really fast, and Wonder Woman has Superman's flight and
strength, as well as a lasso and a tiara she can throw. With these six
heroes, that Joker Robot is as good as dust.
Well, actually, it's already collapsed on the ground, so let's make it worse,
shall we? Start by using Cyborg's laser on the gold box to the right.
Assemble the pieces into an Elec Suit, then watch the robot's left hand (your
right). It will open and there's a target in there. So hop in when it opens
and draw the power from it. Pull off the pull handles on the arm (you can
use Batman, Robin, or Wonder Woman for this) and you'll disengage the joints.
Fly Wonder Woman up to its shoulder and tug on the orange handle. One
arm down.
Next is that gun arm. Assemble the green pieces, then burn the gold wall
down inside. Pull both Pull Handles, and then use Cyborg's magnet on the
blue parts that appear. Assemble the Acrobat Suit panel that just appeared,
then hook Robin to that blue socket on the robot's shoulder. Now, assemble
the green pieces. Lastly, you'll have to fight Joker. He fights almost the
same way as the theater: switch off when he shocks one of your crew, then
wallop him five times total.
Power Armor Lex -
Looks like Lex wants a piece of the action now. Your first mission is to
construct an Acrobat Ball Socket. Stand behind the black items with blue
sparkles and let Luthor blast them with his Deconstructor. This will make
the pieces you need. Assemble the Ball Socket and the planetary laser from
the Watchtower will be ready to go. Hop in as Robin and move the laser
reticle onto Luthor and blast him with the Square button. Hold it down to
continuously do damage. Once you drain the orange bar, he'll take one
heart worth of damage. Continue this for four times, bashing up LexBots
in between. Once he falls over, stand in front of him as Batman and tap
Circle to drag him out and end this fiasco.