If Dark Brotherhood hits the PTS in May I'm guessing it'll be out in June (as TG was released in March)... so looks like they are going to make good on the promise of 4 DLCs per year with the next ones hitting the store in September and December, respectively.

On one hand, it makes sense to put out frequent content to make up for subscription revenue, and I do enjoy the new content... but on the other hand, given the size and scope of Orsinium compared to TG, I feel that maybe doing 3 a year (2 smaller ones, 1 large one) might be better received and appreciated by more people in the long run (and also give them more time in the large one to address deeper issues and changes). Or could they have separated the large expansions from the small DLC schedule entirely?