Overwatch Season 4 is almost upon us, introducing brand-new changes and even complete overhauls to Blizzard's beloved PvP FPS hero shooter. This will arguably be the biggest update since the game reverted to Season 1 following a branding rollback from "Overwatch 2". AdHere's all you need to know about Overwatch Season 4 dubbed "Heroes of Busan", including file size and a countdown. Also Read: Twitch streamer LilyPichu to voice Overwatch's newest hero D.MonOverwatch Season 4 file size, launch and countdown exploredThe update can be pre-loaded on Battle Net on PC up until launch, and is approximately 6.2 GB. Here's the countdown to keep track of each passing moment:AdTrendingAdWhat to expect from Overwatch Season 4?