DC has started releasing teasers for it's 2011 Flash event entitled Flashpoint.
The first referring to a famous spaceship that crashed on earth some time ago. Now you might be thinking that it's referring to Superman's spaceship but we know that Johns is writing this event and with Johns still writing Green Lantern could this image be referring to Abin Sur's ship?
Your guesses are as good as mine and I'm sure that DC has a few more teasers to release and I'll post them here as they appear.
I have no idea what the third teaser is about.