The movie doesn't seem like it'll be particularly bad. Even if it's not a big box office hit, I doubt it'll bomb in the box office.
The CG for the orcs isn't bad, I mean I've seen horrible CG and this is not bad CGI.
I'm more critical of the humans. Travis Fimmel seems to be doing a good job. Medivh looks decent. However, I'm way more sceptical of the other actors.