What was Jon Favreau doing before directing Iron-man? Making a movie about a boardgame that magically transported your house into space, that’s what.
Zathura bombed at the box office only because its release coincided with a Harry Potter sequel. It features pre-Hunger-Games Josh Hutcherson, pre-Twilight Kristen Stewart (who spends most of the movie frozen - a role she was born to play) and even Dax Shepard (Kristen Bell’s husband - okay FINE you don’t care).
Also, awesome practical visual effects you barely get to see anymore in space movies. Well, until the new Star Wars movie anyway.