End of Jan and Feb are typically when the most walls go up and construction happening at DL as well. Nothing has been formally announced but I would expect some refurbs to be happening.
Do note that an entire section of California Adventure is under construction for Marvel Land (former site of A Bugs Land). It isn't too obtrusive, but it keeps you from circling from Hollywood Land to the center of the park - you have to go back toward the front form Guardians of the Galaxy. They just finished a major Castle refurb at DL this year though, so they shouldn't need to do that anytime soon.
As to current DL construction, there are walls at the Tomorrowland entrance from the main hub. The “French fry” rocks are in the process of being removed. What they’ll add in their place isn’t yet clear.