5. Sven Bender
Borussia Dortmund midfielder Sven Bender has been an Arsenal target for quite a while now, but he seems to be happy in Germany. After their late Champions League progression, it is unlikely he will leave this season, as he will want to see if his side can complete the same heroics as last season, and possibly even go one better. So a transfer would be most likely to happen in the summer, and Wenger seems to want a replacement now, though Bender is definitely one worth waiting for.