i think if they did it right it would work, but i don't think a master chief skin in doom would work but a doomguy skin in halo mcc would be better. but still if we are talking about lore theres no way this would work because if master chief was in tds world he would die within ten minutes and if tds was in the halo universe the covanent would all die within ten minutes. but if it were just cosmetic wise it could be cool. btw tds stands for the doom slayer.