You realize that for this brilliant casting to work like that, the audience has to think that bohner was a multiverse Pieto? If not, their reaction is basically ‘why does Wanda think this random guy is her brother, lol? Ergo, fans were not just wildly speculating, they were doing what Marvel was purposefully trying to get them to do.
I will say so far Fisk appearing in Hawkeye is based on the comics connection and not willful misdirection from the writers.