Just recently, the ESRB description for Resident Evil 7 went up on their website (probably earlier than what was intended) which revealed some information about the story setup, confirming that Ethan is indeed the main protagonist and providing further proof (like there wasn't enough already) of gun combat in the game. The page on their website was unfortunately taken down, but not before it was seen by multiple online media sites including Polygon, GameSpot, Eurogamer and Vg247 who, knowing it wouldn't be up long, each took their own screenshots of the website.
Here are a few articles from sites that reported on this before it was removed.
http://www.polygon.com/2016/8/26/12658940/resident-evil-7-who-is-ethan-combat-details-esrb
http://www.gamespot.com/articles/resident-evil-7-weapons-story-details-confirmed-by/1100-6443066/
Official ESRB Description;
"This is a survival-horror game in which players assume the role of Ethan, a man searching for his missing wife in a derelict mansion. From a first-person perspective, players explore the environment and use pistols, shotguns, flamethrowers, explosives and chainsaws to kill mutant creatures. Combat is accompanied by realistic gunfire, screams of pain, and exaggerated blood-splatter effects. As players progress through the story, cutscenes can depict instances of gore and intense acts of violence: a character's arm dismembered by a chainsaw; a man's leg taken off at the knee with a shovel; a character impaled through the face with a shovel. Some areas also depict mutilated corpses with exposed organs/viscera. The words “f**k” and “sh*t” are heard in the dialogue."