I'm reading some practice articles written in Japanese; not sure if they're based on real articles, but no matter.
The title in question is 村上ファン集うカフェで発表待つイベント, and I'm not 100% sure what the 発表待つ part is saying, thus I thought I'd ask.
It looks grammatically incorrect to mean, and I'm not sure what the title is saying as a result of this.
I found a cached version of the article.
In the text, there is
発表の瞬間を待つイベントが開かれました。
From this, you can guess that the particle を is omitted from the title. I think linguists call the practice of omitting words like this ellipsis.
Here is another question about omitting を: The meaning of を in あなたは何をしていますか?
In fact, a whole lot of other particles are also omitted from the title. I'll mark the particles with bold.
村上のファンが集うカフェで発表を待つイベント
Literal translation:
[At]{で} the café [where]{が} Murakami['s]{の} fans gather, the event of waiting [for]{を} the release
