I understand that will can be used to refer to the likelihood of a future event, for example:
I expect (that) she won't like the news
Source: Merriam-Websters Advanced Learners English Dictionary
But what I do not get is why the writer chose to use will with expect in the context below
The past tense may sometimes occur in the if clause (If I knew you were coming . . .), but in British English, at least, it would be unusual. That said, I expect some of us will know the song that has the line If I knew you were coming, I’d have baked a cake.
I expected him to write the sentence below, since he already knows the song he mentioned.
That said, I expect some of us
willknow the song