The argument about Ibra being a prick and so doesn't applies to Suárez eh?
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I don't really think so, but I want to. What would make (Draxler/Isco) leave their leagues for Serie A? Both of them are considered amazing there, they're loved there, and the NT has called them up a few times. If Isco leaves I'd guess it's for BPL. And I don't really think Draxler would leave Schalke that soon.
Suárez could leave, I don't see him going to Bayern, nor to Barcelona or another english team. I wonder if RM is interested on him, if they're not I think he would come here hopefully

but if we can afford his fee/wages is another case.
Ibrahimovic seems to be possible, and even more if PSG signs a new striker either Cavani or Benzema or whoever. He won't go to BPL, Barcelona, or Bundesliga, the only option is Serie A, and we're the only team serious-enough atm to sign him. Wonder if Borussia would be interested on him
And if we want to go for one of those it'd all depend on which formation we want to play next year, I'd take Draxler for his polyfunctionality. He could play LW and CAM which would be amazing for a 4-3-3 and 4-2-3-1, giving us lots of options. But I don't think he could be the best on the CAM position, that'd be Isco for sure, I imagine him behind to strikers as in a 3-4-1-2 or 4-3-1-2.
Suárez and Ibra would be amazing for the SS role, and Ibra could also be a lonely striker and give us one option more, we have Llorente there tho so it's not that necessary for him to play there.
If we will stay with 3-5-2, I'd say sign Reus, Suárez or Ibra.