Big mom's flashback lasted two chapters and you think a flashback of axe briefly coming to wano requires more than o e chapter?
You underestimate how efficient Oda is with one chapter. Oda gave gyukimaru and kawamatsu a whole flashback in one chapter, remember.
And I can already guess what Oda wants. At the start of act 1, he kept showing parallela between Ace and Luffy so now he's showing Ace storming onigashima so that chapter 1000 has parallels of Ace and Luffy again with Luffy storming onigashima
Just wait and see
I guarantee something ace does in 999 will come back in 1000 with what Luffy does
You underestimate how efficient Oda is with one chapter. Oda gave gyukimaru and kawamatsu a whole flashback in one chapter, remember.
And I can already guess what Oda wants. At the start of act 1, he kept showing parallela between Ace and Luffy so now he's showing Ace storming onigashima so that chapter 1000 has parallels of Ace and Luffy again with Luffy storming onigashima
Just wait and see
I guarantee something ace does in 999 will come back in 1000 with what Luffy does