Not happening unless we already know one of Ozil or Alexis is off in the summer.
We buy based on need and currently we're stack for CAM/Wingers: Alexis, Ozil, Iwobi, Welbeck, Perez, Chamberlain, Walcott, Ramsey, 7 players for 3 positions behind the striker, now 3 of those players also play as the striker, so substract 1 and y ou still have 6 players for 3 positions.
I think he's off to PSG.
As for those talking about 'instant upgrade', he isn't, he's a project, in the last 3 1/2 seasons he's started 83 times and had other sub appearances and only managed 16 goals and 16 assists. And that's on a poor league. The season before that he had better numbers that he's never replicated. There's talent there but it's a gamble.