Scout hog edit (all variants-basic, urban, ONI, etc;): Remember the car from Reach where Jorge placed his turret on the back?
-Make the scout warthogs like this, allwing a friend with a turret to "brace" it on the vehicle, giving you a free turret. ^^ (limit of firing angle to 150-120 Degrees, like with Jorge)
-H3 TT hog (all variants, but for balancing purposes add or remove a seat-make it fit 5 or 7 people, with hardier armor since it has no built-in weapons) No real need to explain...
An evil thing for future warthogs with weapons would be the ability to tear off the turret from the back...funny as heck to hop onto an enemy warthog and steal their turret, leaving them with a "new and improved" Scout 'Hog... ^^
-Some anti-jacking warthog where the driver can actually defent him/herself... (not so sure how to work this in...)
For a new gun?
Whiplash/Arcight Hog-have two wielded next to eachother, allowing it to have higher rof and less penetration than Gauss...slow the ROF for arclight one, however.