If two friends play multiplayer, both with custom characters, does that mean only two companions will continue on? I hope not.
Maybe.
But we do not know what the "commit" means. The entire discussion is based on a line about friends and moving on in life and only keeping a few. It makes no mention of party. That's all speculation.
By the way, I wouldn't call them companions. It's a bunch of people thrown together after being kidnapped trying to survive their common circumstances. In single player, you might feel like the leader, but you aren't really. These characters have their own personal objectives that might clashes (we already know Lae'zel and Shadowheart can't stand each others for example).
