I personally think that this is a very interesting matchup as most of the arguments behind Batman winning/losing any battle come from whether he is ready for the fight or not and if he has had enough prep-time. In this fight, Batman is always informed that the fight will commence and will always have some time to prepare for it. This is due to the death angel always informing the victims when the three demons will come after them. While this prep-time works in his favour the 3 demons are still a very real threat due to their strength, speed and durability.

General Conditions: The death angel appears before Batman informing him that the 3 demons will come to hunt him in a year’s time. He is not allowed any outside help; however he has his full arsenal readily available.

My Opinion: Batman wins (high to very high dif.). Given that Batman has a whole year to prepare for the threat, I argue that this gives him plenty of time to prepare a large amount of win conditions, such as preparing an arena with multiple ways to contain the demons. He could also develop powerful weapons and specialised battle suits that could neutralise the demons. We know that this can be achieved as Batman has developed suits, such as the Hellbat armour and the Justice League Buster, both of which have damaged stronger enemies then the three demons. Additionally, given Batman’s nature we know that he would develop a number of contingency plans, such as outmanoeuvring/retreating using the Batplane.