Oda clearly had a concrete design for meme planned from the start. She looks similar to her final design.
https://postimg.cc/gallery/hQ3XT0X/c888f408
There was 8 years between Kaido silhouette and actual Intro.
That is not the case for Pranks AT ALL. The HK silhouette dropped in 1083 which was released on May 15, 2023. Barely a year and we have the face reveal of Pranks.
And it's not like Oda would have had to change his design unlike Kaido. Oda had this twist since at least Revery, probably way longer. And he looks exactly like Shanks. So there wasn't gonna be any changes or mistakes from the silhouette we saw.