Guesses on new moves Luffy will use [manga spoilers]

Luffy got destroyed by the admirals before the timeskip. After the timeskip he's gotten so much stronger. At least i did, i got the feeling that luffy might be able to be some competition to the admirals. But after reading the punk hazard arc and realizing just them two fighting caused all of this, i realized luffy is going to have to become so much stronger to beat the an admiral. What new moves do you think he will come up with to get stronger? Maybe learn all the cp9 techniques.