https://bugs.winehq.org/show_bug.cgi?id=37885
--- Comment #7 from PeterG peter.g.anderson@live.co.uk --- There have been numerous updates to both Wine and Battle.net (now known as the Blizzard App) since this bug was initially reported.
As of now, using Wine 2.4 (staging) the Blizzard app launches WoW and does not display an update button, which is the correct behaviour.
Unable to verify with the latest plain wine (2.6) as the Blizzard app installer crashes during installation.
All tests carried out on Arch Linux 64, using a 64-bit Wineprefix.