We know there is one more big content patch planned for calendar year 2012, and Makeb is almost certainly it.
They never said calendar year 2012 as far as I'm aware. They said "coming this year" in June. This could be interpreted as anytime before June 2013. I wouldn't get your hopes up for Makeb before the end of 2012 because I don't see it happening. I think it will be more like mid February if they keep on their 6 week content cycle.