I think there should be add on's where you can bring in an extra player or a replacement player. You could charge a few dollars for each one, and it brings with them some new dialog, actions etc.
I'd like to see:
a) Homestar Runner
b) Homsar or StrongSad (Either could be hilarious)
c) Nelson Tethers
d) Murray, the all powerful talking demonic skull - who was severely underused in ToMI
e) Doc Brown
Anyway, I guess if I had to pick one, I'd narrowly go for Murray over Homestar but it's a tough pick.
Anyone else got characters they think should be added as a purchasable add on?