How awesome would an NCIS/Burn Notice crossover be? You know, with ambiguously evil Ari and canon sarcastic Michael? (Because ambiguously evil is the best kind. I think the writers could've had a lot of fun with that. But, nooooo, they had to be all WHAM! Obviously evil. *sulks*)
Anyway. Come on. You could go a couple of routes. You could follow canon dates, and have the whole "hot spies meet in the middle of a job" thing, which could make for a really fun PWP slashfic. *grin*
Or--and how much fun would this be--you could have an AU where Ari survives and goes to ground in Miami. And he and Michael meet and... well, chaos ensues. Because I don't think they'd get along very well. I think they'd get on each others' nerves. (They're both very good at that.)
I am such a dork. I can't believe I've actually given this this much thought.