@FPSGamer48 We are making new canvases. Prebuilt structures will come at some point but in a more exciting way. That's all I can say 4 now

— Tom French (@pardontomfrench) January 13, 2016

The talk about an "exciting" return of prebuilt structures makes me wonder if it's not actually structures like we're familiar with in Halo Reach and 4. I dunno if any of you played RollerCoaster Tycoon 3, but among its many great features was an incredibly robust custom content system. It allowed you to save out coasters and import them into other maps... would be very cool if you got a library of created buildings out of primitives you could import in... even cooler if they could behave as embedded or linked objects, so you could customize a base if you needed to for that one map, or make a change and have it globally affect other maps using it. That could be *waaaaay* too much wishful thinking, but it'd certainly be cool! :)