This could have similarity with the Clyne signing. Talented, experienced, young english player, with a year left on his contract. I can see FSG getting hard for it and for £15M odd it's a no-brainer.
The only issue is can we offer him enough? He will want more appearances and consistency of position. Where is that for us? Mane dominates the attacking right midfield slot. Lallana's undroppable. Wijnaldum and Can are already competing. There's certainly room for midfield additions and the squad needs expanding. I'm just not sure how we can sell it. He's already playing for a club which regularly finishes above us, so its not like we can sell the Liverpool experience. I suppose if Wenger is leaving then he may have upheaval regardless of whether he stays or decides to leave. I tend to think he will wait and see what happens over the summer. With Sanchez and Ozil looking likely to depart, as well as the possibility of a new manager coming in, he could easily become a first choice regular next season.