To you it makes no sense because you're stuck inside that box of yours. Oda can come up with anything if he wants.
Oh yeahi’m so stuck inside a box for not understanding your senseless reasoning.
Hey let’s come up with anything he wants then :
-Big Mom will join the crew as a boat
-Rocks will come back from death to open the doors of Raftel to Luffy
-Queen will join as the 4th perv of the crew
-Doffy will join
Seriously stop being fckibg retarded. Does anyone who doesn’t agree with you is someone who doesn’t think outside the box ? There’s a minimum of pattern and sense behind each strawhat joining. Idiot