A quick list of things in the film:

Ninjas
mummies (but really animated clay figures and the raising of the dead)
Yeti (called by a young woman just like the gelfling in Dark Crystal calls the animals)
dragons
shapeshifters
Michelle Yeogh
Jet Li
Bad Chemistry between all the three leads
Really bad jokes about how Maria Bello isn't Rachel Weisz ("I can honestly say I did not have those other adventures")
weird special effects where jet li turns into chocolate

more to come I'm sure.

but all in all, very b-movie, rainy afternoon day movie when you're reading a book and you look up when you hear the explosions.