hmm let's see if i can give the edge to team oro/j-man.
hmmm 1. don't forget, just because danzo has the sharingan arm, doesn't mean it's a sure win. oro actually helped him implant those eyes. besides, the first time oro tried itachi, he was caught off guard. this time will be different. and i think sage mode j-man genjustu would top danzo's genjutsu abilities since he's not a full uchiha.
2. imo arsenal of snakes/manda/8 headed serpent thing + gamabunta/armored toad/gamakichi/transport toad/house toad/gamakensan/ma+pa>>>>>elephant summon + enma...
3. team danzo doesn't have the type of attacks to actually kill oro, especially with his regen techniques. the only one who does is sarutobi, who could seal him. but in this 2v2, i doubt he'd have the time. besides, it's at the cost of his own life.
4. oro and j-man have team experience, unlike sarutobi and danzo. so they know each other's strength's and weaknesses and will be able to capitalize on them.
anyone wanna counter these? other than that, i'd give the win to team oro/j-man actually