Brainslug on 24 February 2008
They're already are: Guitar Hero (2005), Guitar Hero 2 (2006), Guitar Hero Encore:Rock the 80s (June 2007), Guitar Hero 3 (End of 2007). Guitar Hero Aerosmith (June 2008)
Most Likely, Guitar Hero 4 by the end of the year, Plus rumors of additional spin-offs.
Also, having to buy a new guitar everytime a sequel (1, 2 & 3, *not the expansions) comes out.
With what now looks like the upcoming 2+ installements/year in the series, sounds a lot like milking. Though who can argue with 1+ Billion in sales.
