"Long ago, the twelve continents lived together in harmony," The Professor started to explain. "then, everything changed when THEY attacked." He smiled and snickered to himself. He loved steeling people's lines, in this case Katara's.
"Who are 'they'?" Asked Katara herself.
"'They' are the Gaumish. Funny name I know, the country's name is Gauma. They started blasting nuclear missiles and giant machines to all the other nations of the world, and nothing could be done by any of us, even combined."
"Um, I'm sorry, but, what are countries, exactly?" Sokka asked Professor Xandermon.
"You don't know what countries are?" Emmy asked in shock at what Sokka had just asked. Before he could answer her, Xandermon continued to speak.
"I built a machine for the benefit of the world. This machine could bring heroes from all other dimensions and bring them to this very room. The machine has actually calculated who you are, what you can do, and EXACTLY what would happen if you all were brought here, already! I turned on the machine, and now, here you are."
Everyone's jaws would have been on the ground if they were not attached to the rest of their heads! Emmy moaned.
"Oh, man, you would think taking a simple nap on the couch would be restful!" She said with her head in one hand, and her other arm wrapped around her own waist.
"Gee, Emmy, is your hair always perfect?" Luke asked her. She smiled at him.
"No, the reason it's like this right now is because I'd JUST put my head down and closed my eyes before opened them and saw… you." Luke just stood there for a moment before Buttercup started on a fit of rage.
"HOW COULD YOU TAKE US AWAY FROM OUR HOMES LIKE THAT WITHOUT WARNING? OUR HOME TOWN IS IN DANGER RIGHT NOW AND THEY'LL PROBABLY BE DESTROYED BY THE TIME WE GET BACK THERE! AND IT'S ALL BECAUSE OF YOU!" Blossom had to grab Buttercup and pull her back since she was by now smack in front of Xandermon's face ready to kill him in a moment's notice.
"Relax, relax." Xandermon said calmly, he was always calm during the moments when everyone else was freaking out, but then he would always say and do the worst things at the worst times to scare them even more. He found this practice strangely amusing. This, fortunately, was not one of those times. "When you go back home, you will be in the EXACT same spot, situation and time of which you left. Now, I know you are all accustomed to saving your own worlds, but would you, good people, be willing to save mine? Just once?"
The eleven people looked back and forth at each other. And, without a single word, they all eventually nodded to the professor. With some hesitation of course. They would save our world.
"Very nice…" Professor Xandermon said with a wide grin on his face. "I thank you." He then said with a snap of his fingers at the end of the sentence: "And now… It's time… to start training."