I was just looking at Wanda's page and I realized that she's perfect for the next Straw Hat! Think about it, she's a female character that has a unique fighting style and is a new race we haven't seen before. That's exactly what we've been waiting for since the timeskip. I mean sure, we don't know anything about her personality or history, but details. We all know Oda will add those eventually. She has to be the next one, no questions about it. I'm sure Shirahoshi, Vivi, Viola, Rebecca and Monet were all just flukes. After all, we can't be wrong this many times, right? Right? RIGHT?!
PS: In case anyone didn't pick up on it, this was my lame attempt at satire.