Arsenal has signed Shkodran Mustafi and Lucas Pérez. Never heard of the latter tbh. Was gonna say it was a promising signing since he scored 17 goals in La Liga last season, because I thought he was like 20, then I read he's 27 (will turn 28 in a few days) and that he only scored double figures in a season twice in his career so far.
Mustafi is of course a great signing, should be a definite starter next to Koscielny. With this signing and Mertesacker being appointed captain for this season despite being injured for next 5 months, Arsenal looks to continue choosing captains that either get benched, leave for Barcelona, betray the club in some way or do a combo of some of these
Henry - leaves for Barcelona
Gallas - stripped of captaincy for badmouthing his teammates to the press, betrays the club by joining Tottenham
Fàbregas - leaves for Barcelona, later betrays the club by joining Chelsea
RVP - betrays the club by leaving for Man Utd
Vermaelen - benched after a few months, leaves for Barcelona
Arteta - combination of being constantly injured (just 25 games in all competitions in his 2 years as captain) and being benched, retires to become Pep's assistant (Pep coached Barcelona
)