Iron Man Vs Autobots
Tony gets all his movie resources (Jarvis, Iron Legion, Veronica, etc) excluding outside help from additional parties
Autobots = the 5 from the first movie:
[list=1]
[*]Optimus Prime
[*]Bumblebee
[*]Jazz
[*]Ironhide (Barricade)
[*]Ratchet
[/list]
Both sides are fully armed and ready to fight.