In the next issue of White Dwarf there will be an early battle report for Legions Imperialis.
From the cover:
Blood Angels take on the Death Guard in our first Legions Imperialis battle report.
The Warhammer Community website says
…and you can whet your appetite for the upcoming Legions Imperialis in an early battle report.
This will be an issue of White Dwarf I will get when it comes out.
Now what does this tell us about the release date for Legions Imperialis? Well, not anything concrete, but I wonder if this means we might see Legions Imperialis before November? If not then in November?