Sales are a factor in determining growth and sequel potential. Nobody cares if a game or movie is reviewed and gets perfect 10's if it costs 50 million to produce and only grosses 40 million. Prime example in the movie industry is the new Dredd movie. Good reviews, 77% on Rotten Tomatoes, 50 million dollar production budget, but only grosses roughly 40 million. No sequel. Transformers 2, universally panned, was terrible, cost 150-180 million to produce, made roughly 900 million, sequel was green lit 1 week after release.
It all depends on the production budget and if it is financially viable to warrant the expensive costs these days of producing games.
Exactly, most popular literature (bar The Hunger Games) these days are utter bile yet they still sell tens of millions. It's the same for anything really. --- "The only thing that gets me high is the musky scent of my enemy's fear.'' - Stephen Colbert http://s1136.photobucket.com/albums/n496/Elice_Carol/