Guitar Hero On Tour is going on other systems too. Its not going to be fun ecspecially with the crappy singing and guitar redoes. Rockband 2 is out next year!
http://www.vgboxart.com/boxes/Wii/10573_guitar_hero_3_mario_mix-orig.jpg" alt="http://tbn0.google.com/images?q=tbnhttp://www.vgboxart.com/boxes/Wii/10573_guitar_hero_3_mario_mix-orig.jpg" /> ...? I can't believe it either.
Yes there will be a Guitar Hero 4 and like daswiftarrow said it'll be aerosmith and all of there favorite songs from their albums and from their favorite bands
I totally agree with GatsbysCanadianDream, the bands gets too famous for being in Guitar Hero, and I really hate when bands gets that famous. I knew The Strokes long time before GH3 came.
But the answer to your question with GH4: I don't know if there will be a game named Guitar Hero 4, but there will be a new guitar hero soon, It's Guitar Hero: Aerosmith, it's with only songs that Aerosmith made and the band looks like Aerosmith.
I also agree pretty much with WizardInBlack, GO PLAY A REAL GUITAR!