In the following sentences and paragraphs with letters and punctuations, I, Captain America of the YAvengers, who wears red, white, and blue, will tell you why prologues such as this are unneeded in almost every case.
I will have insight from industry professionals in the field of publishing fiction and non-fiction, along with reasons why a prologue is rarely needed.
Stop. Did you read my prologue? I've told you: a) what you already know about me, and b) what I'll tell you, in depth, now. So was that introduction necessary? No.
A prologue, in the definitive sense, is an opening to a story that establishes the setting and gives background details, often some earlier story that ties into the main one, and other miscellaneous information. (Wikipedia)
Ninety-nine percent of the time, a prologue isn't needed. If you've written one, chances are you can scrap it. The setting you've set in the prologue? You can weave it into your first chapter, mix it into dialogue and action.
There are few instances when a prologue works - for example a different POV (point of view), or a snippet from an earlier - or even later - time than when the story is set. Prologues work, but not always. And if you can avoid - then why have one?
My suggestion? To write it. If you feel the need for a prologue, write that prologue. Then continue with the story. Once you're done, go back to your prologue (save a copy of the original) and delete it sentence by sentence, weaving those deleted sentences into the actual story. It will work, I promise.
If you're not ready to trust me - I don't blame you, I do look like I stepped out of a comic book after all - then take it from them.
“I’m not a fan of prologues, preferring to find myself in the midst of a moving plot on page 1 rather than being kept outside of it, or eased into it.”- Michelle Andelman, Regal Literary
“Most agents hate prologues. Just make the first chapter relevant and well written.”- Andrea Brown, Andrea Brown Literary Agency
“Prologues are usually a lazy way to give back-story chunks to the reader and can be handled with more finesse throughout the story. Damn the prologue, full speed ahead!”- Laurie McLean, Foreword Literary
(Source: Writer Unboxed)
You see? If a prologue can be avoided, then avoid it at all costs. Better yet, write it and use the technique I mentioned above and you might even strengthen your story.