I somehow missed this conversation. Oops.
I think you made a good decision going with the PS4, especially if you plan to use it as a Blu-Ray player. One feature that can't be denied is that the PS4 will remember where you are in Blu-Ray discs that support that, but the XBOX One S won't. I have both, and I use both for gaming but my PS4 exclusively for playing Blu-Ray discs.
The Arkham games are sweet. The first two are absolutely amazing, I've played them both through the story. Origins is cool too, but not available on modern consoles. That's the only one I haven't played all the way through. I enjoyed Knight, but I feel it was a bit lacking in the boss fight area. But, that's just me. It's still a good game with a decent story and fantastic graphics and the best version of Gotham City we've seen in a game to date. Also, be prepared for the Batmobile in Arkham Knight. Learn it. Know it. Love it. Otherwise, you won't enjoy the game.
Hey, it's cool, you are here now.
Batmike, if you haven't already, I'd recommend playing the campaign on BFII. It is pretty fun and gets you acquainted with the gameplay a bit.
I have started playing the campaign, video games sure are different now. In other words, I suck. lol.