Pochettino and Mitchell have shown they're not interested in Plan B, just as many guys who can do Plan A well as possible.So far our criteria has been "look at wingers who can score" really. It wouldn't hurt Poch to consider a plan B though. Also, Pato has played out wide before. I doubt he's half as quick as he was. But he was a great dribbler and as things stand, Lamela Eriksen, Dembele, Chadli, Kane and Son don't necessarily scream out "We're going to sprint as hard as we can at you"
It's not about the guys signed before Pochettino and Mitchell got here, it's about who they've shown interest in. Every forward they scouted in summer were young players comfortable both wide and central, and who had pace. I don't think they consider people who don't fit that profile.
We'll see what happens, but I am very skeptical given the evidence we have.