Originally Posted by The Joker
Reese wasn't an average employee. He was authorized to do diligence on the LSI deal numbers. He went snooping into W.E.'s numbers and noticed the Applied Sciences division disappeared. So he went rooting through some old archive files and stumbled across it.
Baloney. How you can equate Batman''s top secret Batmobile schematics being found in the trash by Penguin to finding Tumbler schematics in the place where it was built? It's laughable.
I don't know how Penguin got them, but it's implied he has means: "What you hide, I discover. What you flush down the toilet, I place on my mantle. Get the picture?".
He found the tumbler plans in some old archives?
That's twice as lame. That's even worse than letting Vicki Vale into the batcave (even though it was implied she had already figured out that Bruce Wayne=Batman).