UPDATE: the two names and sets of images have since disappeared from the page. Hopefully, they’ll be announced at a later date.
The Sziget 2013 press photos page seems to list two more bands, that were not part of any announcement.
We’re talking about Rubik and Blaudzun. They both appear on the page, but were not part of any of the announcements. Could they be part of a future announcement?
It all remains to be seen,