January is used to expand Oscar bait (hello American Sniper) and as you say release terrible horror movies and comedies.
American Sniper is definitely the first expansion to explode like it has. The numbers are beyond amazing and my movie theater was hella crowded when I left Nightcrawler.
. Considering bradley cooper also produced sniper i wouldnt be surprised if he winds up getting a massive paycheck for this movie at the end of its run. As for compensating the ( potential) loss of Jupiter Ascending.... to be honest wb really doesnt have movies coming out this year where it is almost certain that they will have a sure fire blockbuster.I'm thinking WB will use the profits from American Sniper to offset the losses from Jupiter Ascending when it hits next month.
Of course, Jupiter could just defy expectations like AS did.