I don't think so. He started out offing Batman's copycats and demanding he unmask himself. Though after the Joker actually came face to face with him, he did a 180.
Of course you can say he planned it all from the start, but I don't that's supported by the script or the performance. He's an opportunist. Just look what he did to Harvey, there's no way he could have planned THAT.
Then why'd he do the 180? And yeah I think he had that part planned as well, figuring that it would take Batman to bring the Hong Kong banker to Gotham which is what he was after in the first place.
Of course it should be noted that his cries unmask Batman and his attempts to kill Batman were very public events, as though he was playing to an audience.
And while he didn't know for sure that Dent would survive the fire he did take avantage of it. But by that time it felt like they had put two different movies together, the first being about the Joke and the second about Two-Face, which made the film feel alittle unbalanced.