Dybala? Heck no. I just feel he's too similar to Messi, left footed; even Dembele is largely left footed. Dybala and Messi cant really coexist together. Even Neymar who tried to play a similar style to Messi, ended up in a disaster. I really dont know why Dybala is such a huge favourite to join us. He lacks height as well.
I would go for Griezmann honestly. He can interchange between a winger and a striker and can be very versatile. Mbappe would be good but very unlikely he would join. Icardi would be a little slow and a little overhyped imo. And I just dont trust in Argentina players ALTHOUGH Icardi can seriously build up some chemistry that can be beneficial for Messi in the upcoming wc.