If this war is as big as it sounds, then it stands to reason that occasionally it would be practical for would-be commanders to take advantage of old pre-existing vehicles for combat purposes when easy access to tanks and tank factories isn't an option.
It's easy to picture something the A-team might build, or any of the vehicles from Mad Max, but that's not exactly what I'm going for. For one, it wouldn't really fit the game's image very well at all. add to that Shadow Revolution's shiny, high tech theme, and this is really just an idea for a plausible Liberation front unit.
Imagine you're part of the old world order, and you want to fight back against the OoN. They keep backing you against the wall, and you're running out of functioning units, but hey, this is America and you've got one of these:
http://www.youtube.com/watch?v=Ovt9l...eature=related (skip to about 56 seconds in)
http://www.youtube.com/watch?v=wrqsD...eature=related (holy crap!)
You get the idea.
They're big, armored, and built to carry really heavy stuff. Impromptu weapons platform?
The pros would be extreme cheapness: they're already built, just weld something dangerous to the roof and armor over the wheelwells/driver's seat. instant disposable tank. Some of them are so monster truck they could probably crush your average tank of today.
The cons are obvious. they're not designed for battle. Controlling them would feel clumsy at best. The weapon of a desperate tank commander or someone with lots of guts/insanity.
I don't think it would be for PvP at all, but it would make a really interesting PvE mission in story mode. A last ditch attempt to take back a OoN controlled weapons depot using only non-conventional vehicles and gear.