That's what I was thinking... Wow.
But it would be pretty interesting if some maps had derelict Mammoth Tank that could be "fixed up" and made operational again. Maybe this vehicle could be in an abandoned GDI base from the first war?
I got one better.
The abandoned Nod base in Sarajevo. The one that was blown to smithereens in the 1st Tiberium War. Then we won't have just mammoths; we can have husks of all sorts of 1st Tiberium War hardware that can be grabbed, repaired, and used by either side. Many of APB's vehicles (APC, Medium Tank, Artillery, and aforementioned Mammoth) can be re-skinned to fit the 1st Tiberium war, and some assets from Renegade (Humvee, MRLS, Buggy) can be re-skinned or given a nice BHP overhaul for the map. This gives us a map that is not only jam-packed with fan service, but one almost straight from Tiberian Sun itself, as well as being a really interesting change of pace from "Go to enemy, kill enemy."