I have always suspected that Halo forge, ever since its introduction, i saw its potential. And with the introduction to the ‘new’ game engine i believe new assets will be involved such as; BOTS, actual AI such as Marines, grunts, Elites, Hunters, Warthogs (With drivers etc), Wraiths etc.
As well as many new aspects such as events, an example being covenant cruisers flying over head or UNSC mac cannons firing, and the implementation of Prefabbed doors, elevators and Map markers.
I also hope and think we will see new vehicles; an example being a flyable Pelican or Phantom (Possibly Spirits). Or in a longgg shot flyable cruisers or corvettes.
This idea drives me mad with excitement and i hope some or ALL will come true!