This is a huge holiday week for much of the world. Between Christmas, Boxing Day and New Year's there are many people on vacation. Those who post the contest threads are either off or doing other things more important than a contest thread in the 1 or 2 days they are in the office this week.
Look under events tab in-game and you will see a preview of what heroes you will need to use for points in FP, Coli and Expo for this weekend. Otherwise, it's the same ole rotation. Last weekend was Diamond and Stam contest so this one is Item Hunter (scraps) contest.
As for the skin or skins you'll get... well I guess you'll find out in a few hours like the rest of us.