The Forgotten Dreadnought appears to be roughly equalivent to the the GDI Kodiak and the Nod Salamander, with high anti-structure power and decent range. It is most likely they will be implemented in the Forgotten counter-attacks that were announced. It is unkown whether any upgrades to this unit will be added.
"Thank you Commanders for helping us name this unit. The Dreadnought seems to be a heavy anti-structure flying unit. It has medium range and medium movement and seems to be very effective against our walls and buildings. We ask you to take extra caution against these units since they we were effective in destroying several of our bases and cities. "
Link to the naming contest: