Looks like Diablo III's release date is imminently approaching with this core decision taken by Blizzard Entertainment. PvP won't be part of the game upon release. It will be available after release via a patch. Can you hear that roar echo? That's over 10 million Diablo fans screaming "YES" excitedly because the game will be out even sooner.
This definitely means there's an internal release date goal established and a press release is in the works.
As we’re counting down the days until we’re ready to announce a release date for Diablo III, we’ve come to realize that the PvP game and systems aren’t yet living up to our standards. Today, we wanted to let you know that we’ve made the difficult decision to hold back the PvP Arena system and release it in a patch following the game’s launch. After a lot of consideration and discussion, we ultimately felt that delaying the whole game purely for PvP would just be punishing to everyone who’s waiting to enjoy the campaign and core solo/co-op content, all of which is just about complete.
While we work on making sure PvP lives up to its full potential, we hope you’ll find some consolation in the fact that soon, you’ll be having a blast leveling characters, finding items, learning the classes, and perfecting builds…and that when the Arenas do arrive, you’ll be all the better prepared for battle.
When the PvP patch is ultimately ready, it will add multiple Arena maps with themed locations and layouts, PvP-centric achievements, and a matchmaking system that will help you and your team get into fairly matched games quickly and easily. We’ll also be adding a personal progression system that will reward you for successfully bashing in the other team’s skulls.
We know a lot of you are looking forward to PvP, and we’ll be focusing our post-launch efforts on making sure the Arenas are as brutal, bloody, fast-paced, and awesome as we know they can be. In the meantime, we’re in the process of putting the finishing touches on what we think is a truly epic campaign and co-op experience for launch.
We’ll have a lot more info to share on the PvP system in the future, and we look forward to the moment we can get the game into your hands. -- source