Leprechaun vs. Wishmaster
Here's a fake trailer that some trailer people made, it's a spoof from the Freddy vs. Jason trailer, and they cleverly edited clips together, they even added SFX when Wishmaster says to Leprechaun "lets see what you got, tough guy", and they even managed to get Lep and Wish in one shot when Lep is wickedly laughing at Wish.
I think it'd be a wicked flick, I mean a friggin leprechaun battling a djinn!!! a perfect match-up, alot better than the Chucky vs. Leprechaun idea, I mean Lep would turn Chucky into the new blood-spattered Barbie, at least Wishmaster would actually put up a good show.
http://www.fangoria.com/clips/lep_v2.mov
"Beds are from whence all Nightmares spring"