Forum:Is "Choose Goose" a pre-mushroom war survivor?

http://images4.wikia.nocookie.net/__cb20091227230730/adventuretimewithfinnandjake/images/archive/b/bc/20100401212842!Wiki.png

The only survivors of the mushroom war are thought to be "Marceline" and the "Ice King (fomally Simon Petrikov)