Rather uninspiring. In spite of sporting a cast of well known Asian action actors, predominantly from Hong Kong and some top shelf special effects.
The best the writers could come up with is a plant from outer space. Does that sound a little dull, well yes, that's because it is. There is a degree of decent action, in the form of aggressive alien creatures, that live on the giant plant and a conspiracy with attack robots. That said, this feels like padding for a core idea that was never great to start with.
In short, nothing special, which is unfortunate given the quality cast and money spent on this film.