「as might have been expected」で「案の定～だった」「予想していた通り～だった」という意味になります。
As might have been expected, he remained calm.
さすがに彼は冷静だった。
As might have been expected, she did a good job of it.
さすがに彼女だけあって立派にやった。
As might have been expected, he got angry with his son.
当然予想しておくべき事だったが、彼は息子に腹を立てた。
They got married, as might have been expected.
案の定、彼らは結婚した。
They made it to the final as might have been expected.
彼らは順当に決勝戦まで勝ち進んだ。