Right, but practically everything there is scheduled for release by the end of the year.
There is no way they can think people will be buying DI2 anytime before next summer at least - as you said, June is the absolute earliest.
And there is no way that they will take a six month break.
They have something up their sleeve - it's clear. If it's hidden on the disc (people are just scanning file names mostly, not delving into the actual content), or will be downloaded, or or any number of things. They are really rushing through content - if all we were getting between now and DI2 is what we know about, they either would have to be planning DI2 for Jan/Feb (suicidal, there is no way they will try that), or be planning for six months of no content (which would be silly because people would then lose interest).
I don't think they are going to keep up this pace, but I cannot imagine there isn't more product planned for the first two quarters of 2014. If that was the case, they would be spreading out the releases a lot more.