Let's review this; you tried to make a universal portal, but your machine broke and now you're stuck here, in DC universe, somewhere in the Wayne manor.

"Don't worry, we'll help you to get back to your own universe, until then, you can make yourself at home." Bruce, known as Bat-man says to you while his children are staring at you curiously.

When Bruce leaves for whatever he knows, Tim or Red Robin grins widely, "You tried to make a portal? That's so awesome." And others are quick to agree.