Basically, yea lol. Both teams are sent to identical worlds, and the only way to travel between them is the portal, which is taken darkness. When we go through the portal, we become 'taken' for the most part, which is 'bad'. Hence why he says something about being bad when you go through. You gotta remember that while gambit is a 'game' for us, it is an experiment for drifter, the nine, and the man with the Golden gun. They are studying good (light) vs bad (dark/taken), how it affects us, whether we can use it later in whatever battle is coming, etc.