Let's say there was a crossover. Right in the beginning of Season 2 of Death Note
How would the cross over series be like?
Since Light just needs a face and name to control people. He could probably use high ranking individuals to capture LeLouch or bait him into a trap. Even if Lelouch used geass on Light's scapegoats, it'd be futile.
Then again, all Lelouch has to do is have eye contact. But Light wouldn't be dumb enough to reveal his true Identity.
It'd be pretty much like a game of chess. There are only two pieces left on the board. A queen, and a queen. Both very powerful.
How do you think it'd work?