Tabula Rasa

Wonder Woman awakens in a strange Room somewhere.
She doesn't remember how she got there.

While she was asleep, she was given more commands via the golden lasso.

'You will forget who you are.'
'You won't know that you have powers.'
'You will go along with what you are told.'

"Where am I," she says, confused and standing up now, "Is anyone there?"
"Alice, is that you," Hatter says from outside the place.

He enters through the door, dressed up in his best Middle-America White Collar Worker get up.

"My name is...Alice? I don't remember...who are you?"
"I'm your Husband. My name is Jervis. You don't remember anything?"
"No...what's going on?!?"

It worked. It really worked!

"You were at a Costume Party, honey. Some of the Contestants got into a catfight over which one was the best Power Girl.

In the chaos, you got knocked out and I took you home."
"That's why I'm...dressed like...Wonder Woman, is it?"
"Yes, just a costume- a good copy, admittedly. Why don't you get more comfortable?

I laid out a dress and hose for you."

Wonder Woman/Alice is confused.
His story does make sense.
This outfit, however, feels right on her.