"Each weekly issue will contain four elements - an exclusive song from a major artist, a song from an up-and-coming artist, a non-music item - such as a digital short film, photography or a reading from an artist or actor - and short videos about (RED) work in Africa."
seems pretty clear that it may be a few weeks now. NME says the Kilelrs are confirmed first out of the blocks, and we will get one major artist a week.