Why Manny Pacquiao delays announcement for April fight?

Although there is still enough time for Manny Pacquiao to prepare for his next fight, Bob Arum showed concern about his April fight card. He mentioned in an interview that with or without Pacquaio Top Rank's scheduled fight card on 9th April will push through.

The frontrunners for Manny Pacquiao's next opponent are British star Amir Khan, American Timothy Bradley Jr., Terrence Crawford, and Adrien Broner.

Why until this point, was Pacquiao still unable to choose whom to fight?

Here's my take.

Well, Pacquiao, as we all know, is gunning for a higher political position in the Philippines. During one of his interviews, he mentioned that if he wins as a senator in May national elections -- the fight in April will be his last, and he will retire for good to focus on his duties as a senator.

With the elections happening in May 2016, a Pacquiao victory in April 2016 would drum up his political campaign. However, it should not be just a mere victory. He should win this fight in an impressive style. It should be, at the very least, a knockout victory.

Apart from that, Pacquiao should not just merely fight a beatable opponent. It should be an opponent that somehow enhances his legacy. So, the question is: Who could be this opponent be?

I believed until now Manny Pacquiao and his team were still not able to figure out the perfect opponent.

Who do you think Pacquiao will fight next?