I certainly hope there's going to be a bit more to the ride itself than just adding some Santa hats to the animals and skippers. That actually looks weird and i'm not sure whether I like it at all...
I'll wait and see what the full ride is like. I'm usually for holiday overlays, but i'm skeptical about this one. It needs to fit with the theme. Haunted Mansion holiday works so well because they completely close it for a lengthy time and it essentially transforms into a completely different ride. Small World holiday somehow fits really well with Christmas decorations anyways and the song melds perfectly with another song (that can also be annoying when played on loop, probably why it fits). Even the Country Bears changed all the songs and costumes to make logical sense. I just hope they do more with Jungle Cruise than what the poster indicates. The skippers dialog changes will likely be fine, as well as their decorations in the boat and queue. But adding Santa hats to the animals seems a bit stupid.
A funny joke would perhaps be to add northern animal figures to the ride such as reindeer or whatever. It wouldn't fit with the jungle theme, but it would be a funny joke. Someone mentioned having Santa crash land in the jungle and replace the guy being chased up a pole by the rhino, also a funny idea.