PvP is something that almost every gamer is avid about. Is there anything more fun then to duel with your friends one on one to see who is better? Or have a massive battlefront in which multiple operations are going on simultaneously? No. Thats why Simutronics has implemented a new type of PvP. This a direct quote from what was said during an interview with Simutronics.
First, the Disclaimer: Our plans for Player vs Player activities in HJ are quite elaborate. Some of it will be available at launch and other parts will be made available with future expansions. What is described here is the intent of the design and may not reflect the actual state of PvP at release. PvP will exist in two basic flavors:

Individual, Clan, and Guilds
This is PvP that pits participants in duels, games, tournaments and PvP quests. Not only will players be able to challenge other players to duels, Guilds and Clans will be able to challenge other Guilds and Clans to duels. Additionally, individual players, clans and guilds will be able to compete for honors in game tournaments, which they can use for bragging rights or to obtain new benefits. In fact, we want to allow guilds and clans to create their own tournaments and invite other clans and guilds to participate.

Factional
There are three main player factions in Hero’s Journey. Factions can conquer territory or compete for political advantages that in turn might help them gain control of the Triumvirate (the ruling political body). When conquering territories, Factions can gain control of strategic resources, which in turn can give their faction certain advantages that can include influencing World Machines, granting of new benefits, items, etc.

When players are not in a PvP world, they may be in one of three states: Opt Out, Standard or Overt. The Opt Out state prevents a player from engaging in or being a target of any PvP activity. The Standard state allows you to engage in or be the target of covert (non-combat) PvP. Certain actions, such as failing a covert PvP action or attacking someone in an Overt state can move you to the Overt state. The Overt state allows any Standard or Overt flagged player to engage you in combat.
 
Another neat thing about PvP, is that you may interact with PvP by not only magic, and swords, but by political influence. Send word to the noble who controls the armies of Elanthia to destroy an opposing faction. You may be part of the army, or the person who bribed a king to start a war! You decide the outcome, and the politics!