>>536026941
Of all the BO3 cast, there's the vague chance Taylor shows up if there's anything taking place in a military academy in 2037 onwards because he's one of the few characters old enough to be an adult. Then there's old non-combatants like Krueger, Salim and maybe that minister guy from mission 1. From BO4, Alex has two daughters and they may show up given they're adults and one has a daughter of her own by 2045. And further from BO4 is everything to do with Project Blackout like Reznov.