I've been planning out the same story and revising it over and over since I was a child (that makes it 10 years now) and finally after so long I'm happy enough with it to consider finally writing the final script and I really, really like it. This is a darling that I don't want to slay, and this is definitely a story I want to tell to the world.
However, being a neophyte, I've decided to first write another story and release that into the wild, so I have a bit more experience under my belt and I know what I'm doing a bit more when I get back to the first story. (The medium is (web)comic, so I'm doing this to improve my art/composition/dialogue/etc. skills first, so writing another story first is a bit of a must.)
I have a few ideas that I really like and am passionate about, but when I develop them further they always turn into a weird variation of the first story (either in a different setting or with different characters) and even with a completely different setup it always seems that the characters' most plausible choice or the circumstances seem to push the plot in that specific direction. Is there any way to mitigate this dilemma?
(For anyone wondering, the story has a whole "anti-hero rises up and takes over the world by effectively manipulating their surroundings" sort of plot to it. I'm pretty sure there are other ways for the hero to rise up against whatever they want to fix in the problem in their life, but it always seems to end up to be this)