I realized that some event have a sub events which its final nodes have unique reward after you beat the node, so I would like to make a thread of a list of them. So far of what I remember and read from, here are the list:
Deadpool vs MPQ -
Final node of 1st subevent will give you Hero Point (I forget it will give out HP until the event is over so I don’t remember how many HP it give out)
Final node of 2nd subevent will give you 2500 ISO.
The Hulk -
Final node will let you win a Hulk cover (I forget whether is it at .he event or the final subevent) (The one on Jan 15 was a Green Hulk cover, not sure whether will it always be 
or will it change to other colours for the next round of the event).
Prodigal Son -
Final node of final subevent will let you win a Sentry cover (I never reach there personally, read it from somewhere).
Enemy of the State -
Final node of each subevent will give you a Enemy of the State Token.
I did not include Deadpool Daily Quest because it let you know the reward for each node all at once rather than open a new node after you beat a node.
Feel free to comment like if there is any mistake I made in the list or if there is any other event nodes with unique rewards that I missed so I can update here. Thanks 