If you haven't read Green Lantern Corps #20 - out this week - you may want to wait a couple of weeks to do so.
It's the epilogue issue to the "Wrath of the First Lantern" storyline and - as it's the end - spoils the story.
How is it a spoiler?
Because the issue that is supposed to be preceding it, Green Lantern #20 - Geoff Johns last issue - has been delayed a couple weeks and will be released on May 22nd.
You've been warned.