The original line up that BTS almost debuted with

Iron

iilevn

Supreme Boy

Basic

BTS was originally planned to debut as a Hip Hop crew, not an idol group. Beenzino was offered to join the crew, but he rejected. 

But then suddenly Bang Sihyuk changed the plan and everyone else left, except for RM, Jhope, and Suga

And then the other members joined the line up

Jin (His dream used to be an actor. He got casted on his way to his school)

V (got in through an audition)

Jungkook (He went to audition for Superstar K and then got casted by Big Hit, he was 15 back then)

Jimin (got in through an audition)

It was truly a God's plan that Bang Sihyuk changed the path from Hip Hop crew to an idol group..

instiz

-I have a question.. Has Jin always had those wide shoulders..? I mean, his shoulders are really wide.. That's just something that you have to be born with.. Does any of you have his childhood pictures? He's seriously so cool..ㅜㅜㅜㅜ

-I personally think they would be successful no matter which path they chose to debut with.. Both line ups are amazing..

-Taehyung got in through an audition? I remember reading that Taehyung got casted when he accompanied his friend to audition for Big Hit, though...

-It is truly a God's plan that Iron dropped out of the group..

-Does that mean the three members from the original line up used to do Hip Hop..?

-Whoa.. That's so amazing..ㅠㅠ I'm sure there were some debate and arguments when Bang Sihyuk changed the whole plan. But he believed in what he's doing and look at BTS now..

-Thank you so much for forming this line up and debuting them as BTS..

-Thank you so much, Big Hit..

-Wow, Iron.. They dodged a really huge problem, then.. Seems like successful people will be successful no matter what..

-I'm so thankful that the person who uses drugs dropped out from the original line up..