A slew of leaked screenshots for Batman: Arkham City have caused speculation about the addition on multiplayer to the formerly single-player-only Arkham franchise. Inspired by that potential addition, we asked our Twitter followers to name the franchises they want to expand beyond one player.

First, our question posed to the Twitter-verse, inspired by this report:

Numerous sites are pontificating on the possibility of Arkham City multiplayer. Which other 1-player franchises would you want to go multi?less than a minute ago via TweetDeckGameProGamePro

Thanks to a timely retweet by Kmart’s gaming team, we saw a very wide range of responses to our query. A pair of our followers thought the first-person action antics of Fallout would translate well to the multiplayer realm. Here are there votes of confidence:

@GamePro Fallout: New Vegas maybe?less than a minute ago via TweetDeckTrevor Weddinggingertastic_10

@KmartGamer @gamepro #gamerchat a single player game gone multi would be Fallout… it would be nice if i could get some co-op help.less than a minute ago via webRobert Richburg Jrbigrob029

Frequent GamePro contributor Mitch Dyer provided one of the most eloquent explanations of a franchises that could easily make the multiplayer jump in explaning the reasons for Mass Effect to incorporate many players:

@GamePro Mass Effect. BioWare’s Star Wars MMO allows co-op dialogue decisions, and I already have a squad of killer characters. Why not?less than a minute ago via EchofonMitch DyerMitchyD

Meanwhile, a few other games were bandied about — some that could legitimately incorporate multiplayer, others not. We’ll let you decide which are serious and which are not:

@KmartGamer @gamepro valkyria chronicles definitely #gamerchatless than a minute ago via TouiteurKakashi_donoKakashi_dono

@gamepro the force unleashedless than a minute ago via txtDhruv Pateldhruvpatel

@GamePro Freecell.less than a minute ago via Tweetie for MacJasonXaiaX

And finally, a handful of our followers made the point that multiplayer doesn’t have to be implemented in every game — particularly when the single-player component is strong enough to stand alone:

@GamePro none. I’m tired of publishers/devs incorporating MP in SP games. Uncharted 2 being the lone exception.less than a minute ago via Twitter for BlackBerry®Gustavo Castrogoose_7

@GamePro Games always feel the need to go multi. Not a fan. Stick to what works. Not all single games transfer to multi properly.less than a minute ago via webBrandonMoney_Launderer

Much like how Arkham City’s multiplayer remains a mystery, the public opinion of taking popular franchises from solitary to online experience varies. Some users brought up valid games that could possibly make the transition, while others have seen too many titles shoehorn in awkward multiplayer to add a bullet point to the box. One thing is for sure — this is a debate that looms as large amongst gamers as it does developers. To get in on the chat, comment below or follow GamePro on Twitter and keep the conversation alive.