The development and testing of phase 2 of the guild brawls system has been complete for some time now, and after reviewing our release schedule and the current guild brawl schedule we've decided that we will be releasing phase 2 TODAY - August, 26th, 2021, shortly after the end of the currently running guild brawl.
We expect the release to happen around 5 - 6 PM ET / 21:00 - 22:00 UTC and it may require a short downtime as everything is updated.
Guild brawls phase 2 is a MAJOR update to the guild brawls system, and you can find all of the juicy details in the following deep dive posts by Splinterlands team member and guild brawls developer - 
Please note that the SPS rewards for guild brawls will not be included as part of this update, but we expect that they will be added in the near future along with SPS rewards for tournaments and ranked battle wins.
Source: @splinterlands/guild-brawls-phase-2-release-today-and-other-updates