Another new live stream will take place later today
Tonight is the first of the NGC Sengoku Basara 4 Sumeragi broadcasts on Nico Nico, which will showcase more gameplay. It start at 19:00 (Japan time) so if you happen to be around then, you can take a look here.
A Sengoku Basara 4 Sumeragi strategy guide is on the way
It's not a big surprise but a listing has now appeared for Sengoku Basara 4 Sumeragi: The Complete Guide. ASCII Media Works will be releasing the book on 31st July 2015 and the price is still unconfirmed. Amazon Japan is charging ¥2,160 for preorders.