I think AW will 'enquire' regarding some key targets like Schneiderlin etc but I'd be surprised if we saw a top flight player in Jan unless via some release clause or potential free agent in the summer.
I think AW will then look to his options and player valuations as per normal.
CB - Reid / van Dijk - I don't think we'll see Reid if WHam want much more than 10m, let alone the 15m+ talked of;
CMD - Scheiderlin/Cabaye as DLPs, Krychowiak/Illaramendi/Bender as DM types - all seem around the 20-30m range;
don't think we'll see Kheira for under 15m, which could see Romulo as a good alternative to provide height etc
WF - Pedro / Giovinco
There are also a number of French players we have been 'linked' to at various times who are potential free agents in the summer and may be available at reduced fees in Jan -
CF - Gignac
AM - Gourcuff
WF - Ayew
CMD - Chantome
I think this transfer window could also be crucial regarding Ozil's future.
If we buy starting types like Pedro/Ayew we could see Sanchez move to #10 and interchange with the likes of Pedro/Ayew/Walcott/Ox at WF. A fluid front 4 of Welbeck, Pedro, Sanchez, Ayew would be tempting re pace on the ball, dribbling, work rate and cover.
Likewise Gourcuff could also replace Ozil/Cazorla as the ball player/playmaker in a reduced role/capability.