with Resident Evil 7, they could also do the Resident Evil 2 route.....in terms of game-play wise, like being able to choose which senario to play (like in Resident Evil 2, you could choose between Leon's or Claire's senario) or something like this?
That wouldn't be a bad idea. You could have 4 campaigns like RE2. Have it so you can choose either Character 1 scenario A leading onto Character 2 scenario B, or vice versa. That way there's only 2 stories but 4 campaigns to play.