Marvel teases 'Everything Ends' for Spring 2015

Marvel Comics just released a teaser that 'Everything Ends' in Spring 2015.

What does it mean???

Obviously this has something to do with the teasers the comic book company has released for Summer 2015. So something catastrophic happens next spring and then the mega events of the summer unfold maybe?

The teasers so far:

X-Men '92 #1 Avengers vs. X-Men #1 Amazing Spider-Man: Renew Your Vows #1 Future Imperfect #1 Inhumans: Attilan Rising #1 Old Man Logan #1 Infinity Gauntlet #1 Planet Hulk #1 Years of Future Past #1 Armor Wars #1 House of M #1

Who's excited?