The truth is I saw a detail in the game, if you play in mode without full screen, at the top left, when you fight Sans, instead of saying ''Undertale'' it says '' *It's your funeral. ''
@@derpz5569 I mean, it fits, all 3 would be plotting to kill eachother for exp, and well, that could open the posibility of having a phase where instead of being a 3v1 its a 1v1v1v1