I think I assumed he was Force-sensitive from The Force Awakens script or at least by the time I got to the end of The Force Awakens script. I thought they were planning dual Jedis. I actually thought that they would Obi-Wan and Darth Vader us a bit.

The Star Wars sequel trilogy could have taken a far more dramatic turn than what we got, at least in John Boyega ’s mind. The actor recently revealed that after reading the Star Wars: Episode VII – The Force Awakens script,

Anakin Skywalker, meanwhile, was trained by Obi-Wan in the hopes of bringing balance to the Force. However, after aligning himself with the dark side, Anakin went against his master to become Darth Vader. Finn's Force-sensitivity, coupled with his past ties to the First Order, could well have seen him go against Rey in the same way.

Finn actor John Boyega revealed what he originally thought Finn's Star Wars story was going to be, and it's so much better than the sequel trilogy.

John Boyega shares initial expectations for Finn's role in the Star Wars sequel trilogy, including a potential Rey vs. Finn storyline that never materialized.

John Boyega had to deal not only with intense vitriol from racist fans outside the franchise, but also feeling devalued within it. In the past, he’s spoken about how the experience changed his perspective on the industry.