|Oh My God: Someone finally made Lucius look good.|
It's the last Saturday of August along with the White Dwarf previewing CSM. (the 25th).This refers to the box set that was hinted at here. There really will be Plasma for all of the Dark Angels apparently.
As for Chaos:
The 25th is the white dwarf which is all about the new starter and chaos space marines.
Pre-Orders for the new starter set begin on the 25th, for release on the 1st.
Pre-Order for Chaos Space Marines go up on the 8th and the entirety of their range will be released in two waves on the 15th and the 29th