Master Event Quest
I think it's a cash grab. Unless you have the best champs with all the boosts, endless potions and revives, or are a god-tier player like Seatin, you're in for a rough fight.
Don't get me wrong, I'm not a terrible player, and I enjoy most event quests; I just feel this quests bosses were tiered up too high for most of your player base. (isn't that the reason you reduced master difficulty in the first place?)
If you're a new/intermediate player, I'd recommend sitting out 100% completion this month. The rewards simply don't justify the fights.
The Heimdall, Hydra adaptoid and red skull all feel like cash cows.
Side note: Gwenpool goes to the movies is awesome so far.