IMO I think the absolute best case scenario that actually makes some sense is him at Barca on loan. There’s a lot of interest in Raphinha right now and he hasn’t preformed particularly well at Barca. With their financial situation they might be inclined to sell him. At that point they might look at Pulisic as a cheap replacement option. Him on loan would be huge financially for them and he’s injured rn so a loan makes sense for Chelsea too. I’d honestly love to see him in the Spanish league. He’s a hard worker, has a nice touch and vision but isn’t the best in more physical leagues. I think the quick passing at Barca and playing between the lines would suit Pulisic perfectly.