The official announcement does not mention what these changes will be, but as an international game players already suspect that it’s going to be the ruleset Korean players have been dealing with for some time. The down side is that these rules are almost universally reviled on the Korean servers, so the thread is full of people begging the developers to not make this change. So this may not be a case of players eagerly anticipating the wars resuming on July 22nd, in other words.
Source: Official Site via MMORPG.com