A transfer window one-off or a sign of things to come in the future?

It’s a little off centre, but Premier League clubs have begun a trend of trying to out-do each other with transfers well before the window opens.
Coupled with Arsenal’s out-of-character move for Lukas Podolski, news arrived that the club were looking to bolster their squad with Yann M’Vila. Emphatic stuff. If that wasn’t enough, Chelsea’s signing of Marko Marin raised eyebrows and plenty of questions, even if it did get drowned in the Saturday afternoon fixtures.
From Arsenal’s point of view, it could be one of two things: the club are looking to appease their fans ahead of season ticket renew...