well

If you don't add anithing new, than i'd say YES =)
http://howlongtobeat.com/ - You can check the "common" length of these games =)

If you got time on your hands, then yes.
Otherwise no.

It would take me about 450 days of playing time to whittle down my backlog. At four hours a week, that's...erm...a very long time.

I don't think so, sorry :(

If you don't have a life (i.e. job, significant other, other hobbies) yeah I think it's possible.

I doubt it xD I mean, the Elder Scrolls games alone will take quite a bit of time. Well, unless you mostly ignore side quests and DLC.

Depends if Elder Scrolls means the whole series of just one game. That said, you definitely can do it. Will you? Up to you. You have almost 14 months, so that's a lot of time.

witcher
witcher 2
witcher 3

see you in 2017 :3

I was thinking along the lines of ..eating whole cake by yourself
Anything you do for sake of completing becomes a tedious task. Spend your time wisely, Enjoy the games. Speedrunning is..well have you ever been in cake eating contest? contestants just gobble them up no moment to chew a lil or taking a moment to smell it..taste it..admire texture.. you get my point..
Point is eat cake godammit. Icecream cake FTW!

well, you can trade all of them for skyrim + mod and it would be no, otherwise you can do it

you didn't put skyrim in the S section so i didn't see it D:

Just.. DO IT!

It's good to have goals.

oh jesus.. xd good luck.

Nope.

Depends. Have any kids?
If so, no chance!

If not, doable but say good bye to your social life

No.
Don't get me wrong. It isn't because I have no faith in you. It's just that realist in me thinks it isn't going to happen.
Who knows. Maybe me saying you can't do it will push you harder to actually do it.

nope...
but try Xcom with "the long war" mod (look it up in google)

If you don't get sucked into mods and/or repeated playthroughs (especially high risk with Skyrim, Xcom and Mass Effect there), you might have a chance. But with Witcher series on there as well, it's going to be a steep challenge ;)

http://www.youtube.com/watch?v=ZXsQAXx_ao0

Depends what you mean by "finishing". If you'll play "Quickly to the THE END, just doing minimal amount of work", you'll do it even in 2015 :P
For example:

• Skyrim's main story can be finished in 3-4 hours.
• Hitman on easy can be played like shooter, which will let you win it in few hours.
• Mass Effect has lots of side quests, but if you'll only stick to main ones you'll finish it rather fast.

You can do it :D