Thyme Opco have agreed to purchase the Flybe brand from the administrators, something I'd doubt they'd have agreed if they intended to launch under a different brand. If anything restarts, it will be as Flybe.
Whatever you say about the state of the Flybe brand, I guess the new owners see little benefit in spending money on brand creation, aircraft repaints, crew uniforms, airport signage, etc, at this time. Probably best to get the airline established and back flying before wasting money on something that really won't generate any positive revenue.