How far am I into the main story? Just finished
You're browsing the GameFAQs Message Boards as a guest. Sign Up for free (or Log In if you already have an account) to be able to post messages, change how messages are displayed, and view media in posts.
It's not 23% through the campaign, it's 23% completion, which includes Riddler's trophies, side quests, etc. When I finished the game I had 48%, and that was with a bunch of Riddler trophies collected. You're probably about half way through.