There is only one tricky fight on this DLC. The rest is quite straight forward!
For the combination to open the factory door, just look around for numbers in the objects that represent each switch. The Oscar like statue is right in the front of the switchs. The Robot is way back in the room, next to the Ferris wheel. Check the number on those and you'll have enough to guess the rest...
For the fight in question, you'll have to deal with a significant amount of robots while lasers cross the arena and the plates on the ground progressively get electrified, leaving you less and less room to fight.
The key here is to end the fight quickly, before to much plates are energized. For this, the best strategy is to build a high combo using only simple strikes and counters (
). With a high combo, Catwoman will start destroing the robots with single hits. Avoid using combo finishers as it will cool down your streak and take longer to destroy everything around. If you manage to keep the combo counter getting up, the battle will end way before only the central plates haven't got charged!