To the OP:
For the Jugganaught idea, how about this:
12 Kill Streak - Juggas (or something related to that)
When "called in" a pave low (no gun on the side to make it fair) will fly over and hover in a space on a map chosen by you, the back "door" opens and roughly 5-6 A.I Jugganaughts will rope down and move around the map as a unit (or two teams of 3) and will continue killing the enemy team until killed.
To simplify:
The pave low will fly off after deploying the Juggas
The juggas are weak againest knife kills on their backs
They walk like they do on spec ops.. slow.
If you kill one you recieve an acceptable amount of XP (200 or 350)
If they put that KS in, I'll definetly select it