The answer to “how possible is it,” the answer is “anything is possible.” If you want likelihood, the answer is “not very likely" that a low-budget game by one person will enter AAA territory. Best example of one that did (proving that anything is possible) is Angry Birds. There are also cautionary tales, like Flappy Bird (hmm, both involve birds - what do you suppose that implies?).

If you want to ask marketing questions, you can ask those in the Business And Law forum. You should read other threads in the B&L forum, lots of discussions there about marketing.

Edit: I see frob has posted a reply while I was writing this. I like his answer better than mine.

@frob I bookmarked your post. Thank you for the effort you put into the post!