New details have been revealed from an Amazon listing for the upcoming Resident Evil Vol. 4: The Marhawa Desire. The manga is being published by VIZ Media with an ISBN-10 of 142157375X and ISBN-13 of 978-1421573755. If you haven’t already, you can preorder the fourth volume of the series with this page on Amazon. Take a look at the cover of the manga below this paragraph. 
For the uninformed, The Marhawa Desire is set before the events of the Resident Evil 6 videogame, which was released for the Xbox 360, PlayStation 3 on October 2, 2012 (and then ported to the PC on March 22, 2013). The manga features some new characters as well as cameos from Chris and Piers. You can check out the description below:
Overrun by zombies, Marhawa Academy has been transformed into an image of hell by Nanan, now a bio-organic weapon, and her gas spray. Three members of the Bioterrorism Security Assessment Alliance, Chris, Piers and Merah, finally arrive on the scene of the pandemic. But what should have been a ray of hope for Ricky quickly turns again to despair…
Resident Evil Vol. 4: The Marhawa Desire has a total page count of 176 pages and will be released on the 19th of May.
On the gaming side, Capcom recently finished releasing all episodes, plus the physical disc version, of Resident Evil Revelations 2. The new game was also set before the events of Resident Evil 6. It features the return of Claire, sister of the above-mentioned Chris, along with Barry and several others as playable characters.