Paizo has released two new martial classes for testing!

Commander

The commander is an Intelligence-based tactician with unparalleled authority over the battlefield! But they’re no slouch in the fight themself, being trained in martial weapons and all armors, so if you want to lead your fellow adventurers to victory, be sure to playtest the commander!

The Commander is a support martial class that buffs the party using Tactics to grant 2+INT party members extra reactions. They also buff nearby allies with a fear-opposing aura.

Guardian

The guardian is a Strength-based protector who excels in the use of armor, both for their own benefit and the aid of others. If you are the type of player who enjoys keeping others safe from harm, be sure to playtest the guardian!

The Guardian is a pure martial Tank, with some features that seem to be similar to Champions without the magical element. A defensive expert, focused on redirecting damage away from allies and towards themself, they have abilities that buff ally AC, and nerf enemy attack bonuses against allies while buffing those bonuses against themself, incentivizing enemies to attack them first.