Last year stuff on the Editor's Choice list went on sale throughout the month of January while the coupons were active. Not all at once, but each few days brought different sales on the EC list. I was a little annoyed with myself for using all my coupons early and then watching things go cheaper but whatever. It was a learning experience.
Not to sound ungrateful, but doesn't that make the promotion a bit silly then, considering nearly all of the games for January would have been cheaper during the winter sale than taking $5 off their full price?
I have no way of knowing if they'll run it the same way this year. Since the coupons are good all month, I'd just note which games you're interested in and watch the site and/or this thread and see if they get a discount. Coupons are good all month anyway and I'm sure your backlog misses you.