Today I stumbled across the info that Demiurge is doing the Aliens:CM Wii U version so I decided to create a little overview over how the ports of the current-gen games are being handled across the board.
Straight Right/Tantalus Media (Mass Effect 3)
Straight Right itself is still pretty young but they're a sister company to Tantalus Media who are an experienced port-studio, mainly doing handheld ports but also responsible for the Xbox version of Unreal II, for example.
WB Games Montréal (Batman Arkham City: Armored Edition)
no track record whatsoever (aside from a browser game) since it's a brand new studio
Demiurge Studios (Aliens: Colonial Marines)
Lots of Unreal Engine experience, started out by making a UT2004 mod, then helped out with the first Brothers in Arms games, the BioShock intro area, Mass Effect PC port + DLC, Arena Mode in Borderlands, Titan Quest, Rock Band.
Vigil (Darksiders II)
We haven't heard much from them regarding the Wii U version but from what they've talked about, they only have a small team from withing Vigil working on the game so no external port-house seems to be working on this.
4A Games (Metro: Last Light) (development on hold)
Let's not totally write this game off, even though it has been put on ice indefinitely. Apparently it was due to lack of resources which means it probably was worked on by 4A themselves again.
Ubisoft Montreal Studios (Asssassin's Creed III)
This is also ported in-house.
EA Canada (FIFA 13)
Also seems to be developed in-house.
EA Tiburon (Madden 13)
My Google search told me that the Wii U version is being handled by a dedicated team within EA Tiburon.
Heavy Iron Studios (Disney Epic Mickey 2: The Power of Two)
They worked on a lot of license games.
Anything I've missed?
Was this even useful? I just did it because I was curious, no idea if collecting this info had any greater purpose or potential use, though
edit: added Epic Mickey studio