Victoria has so much age, that if she wants to get pregnant, she shouldn't in any case think about her brothers wedding. Hers and Daniel's child/children come first.
The sooner Carl Philip and Sofia tell the wedding date and the place, the less the press and media has to speculate for. And because it seems that they both enjoy to be at the media very much, the longer they delay the news, the more the press can write and speculate. And ask about it every time from Margareta Thorgren, when she comments something regarding the royal family. And Thorgren must comment it. And the press writes.
When the date and the place are told, it tells already quite a lot about the wedding.