If you could create supergroup, who would you have in it? The members could be living or dead, and they could all hate eachother for all I care!
This is meant to be a fantasy group, so there are no real rules to follow...besides the following. You need to have one person for each position, like this:
Vocalist
Lead Guitar
Rythem Guitar(optional)
Bassist
Drummer
Keyboardist(optional)
Have fun!
