From the announcement:
WizKids is pleased to announce the upcoming release of the real-time war game, Wartime. Designed by Josh Tempkin and Brad Lackey and developed by Christopher Parks and Christopher Guild, Wartime brings the fight between Valyance and Firebrand to your tabletop.
In Wartime, players must think fast as sand timers dictate the activation of your units. When a unit moves, attacks, casts a spell or uses a special ability, a sand timer is flipped. That unit cannot be used again until the sand timer is drained and then, that sand timer, or another sand timer, can be used to activate the unit again. With sand timers of 30, 60, and 90 seconds, players will have to use their units wisely to defeat their enemies.