User blog comment:AYET/The Mera Mera no Mi and Doflamingo/@comment-1595565-20130301053836/@comment-4754162-20130304071400

In a sense, you meant to say Doflamingo was aware about Luffy's survival (Ox Bell incident), found the fruit, knew it will come in handy in future against Luffy. But how will he know Luffy will be going against him when he re-emerged? He can't have foreseen that coming, can he?

Or do you meant when Doflamingo found the fruit, he knew it will come in handy against anyone in future and thus safely keeping it until the time is ripe, coincidentally the opportunity that surfaced was against the very brother of the previous owner himself?

You mentioned (in the other blog of mine) about Doflamingo trying to use the fruit to "dissuading Luffy to continue the alliance ", I agree with that, if he can make the Law~Luffy alliance unstable, he will not be (very) worried about Law going against him.