I'm guessing he's flashing back to how he declared his intent to destroy their descendants when they sealed him in OoT.
I think the term that best suits the scene is "Irony" since he's probably thinking "Heh, figures."
Edit: On an unrelated note, I think it's interesting that Nintendo decided to actually let OoT, MM and WW run like a trilogy. MM alone was odd enough since each game was traditionally an unrelated story.