I guess they're looking back at the huge success ZERO HOUR was and are deciding to do it again. ;-)
Add the X-Files meets Detective Munch in "Unusual Suspects" and the X-Files meets the Brady Bunch in "Sunshine Days"

Also, the greatest Star Trek crossover is "Trials and Tribble-ations"
which includes Sisko meeting Kirk
[en.wikipedia.org]
I vote for Ra's al Ghul. All the guy wants to do is get rid of the six billion extra people who are mucking up the planet so the rest who are left can enjoy it to the fullest. What's the harm in that?
We Come from the Future
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