The game is still a ways off, so we don't know if they're actually going to leave the name as Guitar Hero 5 or if they're going to remove the numeral and just put a subtitle, like they did with Guitar Hero World Tour. I think it'd be pretty silly if they didn't. But as to why they keep the name Guitar Hero when they now use a full band, like the above user said, it's all about name recognition.
Guitar Hero World Tour sold far better than Rock Band 2, despite the fact that most people would agree that Rock Band 2 is the overall better game. The reason is because Guitar Hero is a well known name that basically jump started the instrument based music game trend.
Because it's a well known name, so it doesn't have to build up a new reputation, and of course the guitar is one of the most important parts of a band.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.