Attack on Titan / Shingeki No Kyojin - Everything changed when the titans attacked

Me and my siblings tried theorizing that Attack on Titan and Legends of Korra were in the same universe. The events of Attack on Titan happened a century after the events of Korra. The walls in AOT are the walls of Ba Sing Se, the Three Dimensional Maneuver Gear came from the metal wires that the Metalbending Police Force used except modified so non-benders can use it, the Titans are angry spirits, and Connie is the new avatar (because he looks like Aang :3).

Since when was Connie NOT a badass?