Does Luffy Have New Techniques Up His Sleeve?

Back at Fishman Island Luffy declared war on Big Mom and said he would kick her a$$ all over the New World, but many of you think that will not happen and that a Luffy and Big Mom alliance is more convenient, but I do not think so. I think Big Mom will go down this arc or another time.

Okay to my question, I was wondering what Luffy meant by this statement? Does that mean Luffy has more skills and techniques up his sleeve than what he's shown us?



New Attacks From Luffy
Gear 5