^Unless they haven't finalised that material.
It's nearly February now. They know exactly what's happening this year.
Plus, the point of that material is to let merchandise buyers for the retail chains know what kind of support they can expect from the series. If there's eight episodes in the spring or a special in the autumn, buyers will want to know that because that's when their customers will be high on Doctor Who
. Likewise, if there's nothing in the summer or winter months, buyers will want to know not to stock Doctor Who
merchandise then because it's dead weight. The list, in other words, is a guide for the buyers to let them know when to stock their stores -- and when not to. And buyers don't like surprises and rush solicitations because they're very hard to plan for and very difficult to gauge accurately.