Just wandered off network because if there's one thing I love, it's clever crossovers :)

I'm definitely in favour of the Buffyverse/HL Watchers are Watchers crossover--I think nothing in canon contradicts that idea. Plus, Giles and Joe jamming together? Awesome :D

I'm not so sure on the others, though. Neal comes off to me as too young (emotionally) to be an Immortal, though I can definitely buy Mozzie as one. I like the idea of Lex getting the Inception team to probe Superman's mind, though I wouldn't want it to actually succeed--that's just too disturbing for me!