Mythological Monster NOT seen in movies that you would like to see.

[onagro]

I could see a Drop Bear movie marketed to be an epic summer movie for some reason, complete with the serious deep-voiced announcer saying "This summer, they will get the drop on you!  Drop Bears, rated R!"

I'd see it.

[HarlotBug3]

Aswang in the Philippines

http://en.wikipedia.org/wiki/Aswang#Appearances_in_other_media

Bunyip in Australia.

http://en.wikipedia.org/wiki/Image:Bunyip_(1935).jpg

What interests me about both of these is the wide variety of descriptions associated with the same name. This extends not just to what the monster looks like, but whether it is a monster/rare species or an evil spirit.

It is already scientifically recognized that 'Mega Faunna' were still roaming Australia less than 100,000 years ago. As for Aswang, I've heard Americans living in the Philippines describe it more as a mystery than a myth, as something the locals (modern educated people as well as tribal villagers) take very seriously.

I imagine a team of cryto-zoologists catching one of these things...then realizing that they need witchdoctors rather than outdoorsmen. 

[Raffine]

Lizard Man of Scape Ore Swamp aka South Carolina Lizard Man

http://en.wikipedia.org/wiki/Lizard_Man_of_Scape_Ore_Swamp

Definitely a candidate for a Sci-Fi Channel movie all his own!