Hello Vaiwhilloonn33
You could also travel via Germany: Basel - Frankfurt - Brussels. It may be possible that a new direct train from Cologne to Antwerp will be introduced with the new timetable, but only two times every day. Otherwise it should be possible to travel every hour via Brussels. The prices and conditions may be different is you take an ICE or an Eurostar.
Usually the new timetables are released mid-October in Germany,
Kind regards
Daniel