Rise of the Guardians
Pitch's Return
Prologue
It's been seven years since Pitch has been defeated, Jamie is now fifteen and still believes in the Guardians. Sophie is nine and is always energetic around Easter for a visit from her favorite Guardian.
Jack visits them every winter when he gets the chance, Bunny also comes every spring and summer when he gets a break from painting eggs. The four are close together: Jack brought Jamie to visit his Ice Palace, and Bunny brought Sophie to the Warren again, the first time she was two years old and didn't remember.
During the night while Sandy delivers dreams, the wind has a faint trace of laughter in it and no one knows why. He also noticed traces of black sand in his golden sand, and thought about telling North that Pitch might be returning.
Manny knew what was happening and thought that they needed some help so he knew who could help them but waited until Pitch appeared to tell them.
At a house a little boy was dreaming about playing in the snow with his older brother as a dark figure came out of the shadows. "Oh what an adorable dream," Pitch said as he finger tiptoed to the golden sand and touched it, turning it into a nightmare. "But what's more powerful: its fear."
More Nightmares came and ran to the other side of the world. "Nice to see you again old friend," He said as he looked at the moon. "Neither your Guardians, those kids... or your son can stop me now."
Manny needed to tell the Guardians and get one important Guardian: his son.
I read on fanfiction that Manny created someone that's space-like too, so I thought that the Guardian is his son.