My favourite games have always been the Halloween/Christmas holiday games, especially the 2018/2019 Halloween havoc. It is such a good game that i suggest it is made available all year round, well not exactly. My first thought is a slight re-skin, mainly the town at the beginning, dialogue and the bosses appearance, meaning that this game would no longer be heavily themed but could come back in october. My second thought was a time trial mode. If this were to happen a few ideas would be, a leaderboard to see how fast you can do it, which classes where used, how many deaths and anything else (i'm not to creative). My last idea was something beyond challenger mode, one where you get special rewards upon completion. The challenges would be something like "Complete it with only one class used," "Everyone needs to get similar damage amounts," or "No weapon abilities," for the last one, ultimates and passives would be allowed.