I have read a lot of stories of Harry Potter being the real savior and then being ignored. So here is a story of Harry being the savior and his sibling being ignored.
A prophecy started it all. A half heard prophecy actually started everything. It was not all heard by the eavesdropper for a simple reason, he was caught by Abeforth Dumbledore. Abeforth, who didn't live up to his older brother, Albus Dumbledore, became the owner of the Hog's Head in Hogsmeade. The place was run down because it is not as popular as The Three Broomstick's, so it tended to attract most of the Wizarding World's more shady characters, like criminals and hags and werewolves. However, Abeforth did maintain some things in the rundown place, like having privacy. He could not stand someone that invaded other people's privacy. He had to deal with it when his father, Percival, went to Azkaban. He had to deal with it when Albus was being celebrated for his intelligence. He also had to deal with it when his dear sister was murdered. So, he was not about to let someone eavesdrop in his place. Abeforth may not like his brother, but there was no way he was going to let whatever was going on in there be let out by someone who had no regard for privacy. But how was he to know that what he just did would save and ruin so many lives?
Michael Potter was born on August 1st. Michael was only a few hours younger than his older brother. However, this also meant that Michael was supposedly safe from Voldmort's wrath; as Voldmort was only after the one born as the seventh month dies, born to those who have defied him thrice. That only left two possible candidates, Nellive Longbottom, born on July 30th to Frank and Alice Longbottom and Harry Potter, born on July 31st to Lily and James Potter. Which one was Voldmort going after was the only question that remained.
Severus Snape was the one who answered the question, for his love of Lily Evans had never wavered after all these years. He was still deeply in love of the Muggleborn witch, and he wanted to save her. However, he knew better than to approach her, so this lead to him begging Professor Dumbledore to protect Lily Evans. He cared not for her husband or their children, but if it helped protect Lily, he would stand in front of James to protect his Muggleborn witch.
"Are you sure about this," James said.
"Yes," Dumbledore said. "I have gotten this from a reliable source."
"A source who you won't tell us," Lily said.
"No," Dumbledore said. "I am not going to tell of the source. They wish to remain unnamed at the moment."
"So what are we going to do," James asked.
"I think that you should move to another village," Dumbledore said. "And then make someone your Secret Keeper. I will help you in any way possible."
"Ok," James said hugging his wife.
"We'll help too," Fabian said. "Won't we Gideon?"
Yeah," Gideon said nodding. "You are not going to stand in this alone. You have got all of us behind you."
"And in front of you," Daedalus said.
"And beside you," Sirius said grinning broadly.
When the rest of the Order made their vows and promises, Lily and James felt a little better. They had people that would help them and would lay down their lives it the situation called for it. They were far from happy but they were relieved that they didn't have to go through this alone.