I don't believe Luffy's going to get a warm-up fight.
He already had a clash with P1 where we saw how his G3 has grown stronger. He had a clash with Yamato where he showed off better mastery of barrier haki and penetration haki by easily removing the cuffs.
If he does anything he's going to have a clash what Big Mom until he moves on to Kaido. Right now, he's the only one in the area that stands chance against Big Mom..
He already had a clash with P1 where we saw how his G3 has grown stronger. He had a clash with Yamato where he showed off better mastery of barrier haki and penetration haki by easily removing the cuffs.
If he does anything he's going to have a clash what Big Mom until he moves on to Kaido. Right now, he's the only one in the area that stands chance against Big Mom..
I agree on the Haki/cuffs thing, but let's tone it down with the Illuminati-confirmed levels of rationale for random ass Zenkai boosts.