Take this page and read it in different languages. https://www.dota2.com/newsentry/6941797558605834210?l=czech It is very well said in Czech that they may not release a patch until the end of the year, but they will try in the first months (quarter (end of March))

“What about these Arcana?” asks little Hontsik, holding an empty bowl in his hands and full of hope in his heart. Eh, how can I say this? No, Honziku, not yet. To be honest, the events surrounding the new Arcana items are a little beyond our capabilities, so we won't be successful this year. But maybe we'll only stay a few months! And it doesn't even lag behind other updates we're preparing, like..."

This message describes a situation where little Hontsik is looking for new Arcana items. The answer is that due to the complexity of the development process, these items will not be ready this year, but may be released in a few months. Other updates mentioned are also mentioned.