What if there was a 5th turtle and Splinter didn't saw them?

When a stranger from the future travels back in time with a dire warning of an almost indestructible army, a Demodragon, and an evil from another dimension that is endangering that universe by reviving an evil being, the Mad Dogs must help their counterparts defeat the Demodragon, or all is lost...forever. Will the turtles defeat them all, or all of New York will fall under the evil's wrath? This is a mix of the first adventure the turtles had in TMNT 2012 season 5 and the movie. Pls read this only if you find the other one long, boring, and confusing.

Leo had gone on a dangerous mission weeks before. His family and friends worry for his safety but are gladly suprised to see him waltz through the entrance of the lair, alive and well. But, something's different about him. He was acting.....weird. Everybody is blind about this fact except for his hotheaded brother, Raphael. Leo kept acting more and more different as time went on, sneaking out when everyone was asleep, calling secret "friends". What happened to the leader that they called their family?

Here are some oneshots while you wait for the chapters to release