I don't think you can compare movie IP's and game IP's to the same level of appeal (if that is the right word). Movies sell themselves on what they can show, and since most people generally want to see the same stuff they always do, you get sequels, reboots, and adaptations. But since games are an interactive media, they sell themselves on what you can do. So even if we're seemingly getting more new IP's in gaming, those IP's themselves display very similar gameplay to what is popular at that particular moment.
Both Shadow of Mordor and Alien: Isolation seem to be perfect examples of this. The first is apparently a mix between Assassin's Creed and Arkham Asylum, and the latter is not unlike all those "stalker" horror games that have been gaining a lot of popularity.
Both Shadow of Mordor and Alien: Isolation seem to be perfect examples of this. The first is apparently a mix between Assassin's Creed and Arkham Asylum, and the latter is not unlike all those "stalker" horror games that have been gaining a lot of popularity.