Pizza = Kenny
Ice Cream = The Group
I think that the Pizza or Ice Cream choice that TTG has yet to unleash on us is code for a Kenny or The Group choice. They have the same number of letters which makes me think it is a code. I am guessing that the choice will be pretty grisly either way. If we choose Kenny we spend more determinant time with him but are separated from everyone else while seeing many group members die. If we choose the group then we will lose Kenny again and find him later on near the verge of death.