From IGN.com:
Why is Weezer in Guitar Hero Van Halen?
Blame Wolfgang.
August 10, 2009 – Last week, Activision announced the track list for ‘Guitar Hero Van Halen‘, due out this December. Along with more than two dozen Van Halen songs, the likes of Weezer, blink-182, and Tenacious D are also included. Wait, what?
IGN caught up with the head of music licensing at Activision, Tim Riley, to find out how those bands came to be a part of Guitar Hero Van Halen. Turns out it was all Wolfgang’s doing.
“At the end of the day, it became Wolfgang Van Halen, who is a serious Guitar Hero player — probably the best Guitar Hero player that I’ve ever seen including people at Activision…They knew that, (the Van Halen brothers and David Lee Roth), so they were like, ‘Ask Wolfgang what bands he wants in.'”
And did David Lee Roth’s massive ego have anything to do with the lack of Sammy Hagar songs on the disc? “David Lee Roth – I don’t know that he demanded anything,” said Riley. “That guy was so cool and so pleasant to work with.”
He continued, “In my mind we never even talked about it…I don’t think the band ever said ‘no’. I don’t think we ever requested a single song or ever talked about it. It certainly wasn’t David Lee Roth saying there was no way or this is a mandate.”