Here's the trailer:
These Yetis look to me like a cross between an Ewok, the Lorax, and maybe the Doctor Who Abominable Snowman.
Anyway, this is an historic moment.
Unless something unexpected happens, I expect that this inclusion of Yeti in a big holiday movie will be the biggest Yeti news of the year. Let's see if anything else can top it! *
And I think this will be the first time that there is a mainstream piece of entertainment that pairs Yeti with Santa Claus since Bumble's debut in the 1964 Rudolph the Red-Nosed Reindeer TV special. I mean, people are constantly making references to Bumble and Santa, but based on their look, I'd say Rise of the Guardians' use of the Yeti is a brand new thing that isn't trying to pay direct homage.
* Note: Just remembered that this year it was revealed on the Simpsons that Moe's father was the Yeti. That is definitely a contender for top Yeti news.
(Check out last year's Top 10 Yeti News.)