Some of you guys really have no clue, this isn't FM. You can't have two world class keepers fighting for one spot, in real life one just finds a new club. I would say that I agree with Vertonghen being an option, as he wants to come to the club and this would allow us to have a little CB/Left Back support, as Vermaelen has played very well there earlier in the season, and also gives a backup enforcer for Song as he can play DM, though admittedly I have no idea if he's quick enough on the ball to play this role with. This perhaps lets Wilshere drop into the AMC role. Hazard or Gotze would be great, but lets be realistic, Podolski and Vertonghen I'd be happy with.
M'Villa has been talked about for a while alongside buying Fellani from Everton, and perhaps for 4-2-3-1 against tough sides it would give us the dual defensive midfielder lineup we've not had since Petit/Vieira which sured up the middle and allowed good possession. I just can't see him joining when we already have Song, Arteta, Wilshere and Ramsey, it isn't the way Wenger does transfers. Perhaps this would encourage Ramsey to really work on his game, though.
You are right about GK situation. Wenger has 3 options now. 1. Buy young GK to threaten Woj in couple of years ( Butland ) 2. Buy / Sign on free old GK who has couple years left in him to be useful backup 3 Or promote some of our current young goalkeepers to 3rd spot.
I dont know where have you all taken this idea of using Vertonghen as backup Left Back? Haven't seen him play there ever for Ajax or for Belgium NT either. It's Vermaelen who plays there if needed for Belgium NT.
Wenger has already bidded 20m for M'vila last summer. If we manage to sell both Denilson and Diaby then we need player in this position.
Getting M'vila would mean we have 2 players for every midfield position + Coquelin. Arteta/Wilshere, Rosicky/Ramsey and Song/M'vila. Coquelin's versatility allows him to play in either Arteta or Song role and as a either side FB if needed.