RE: Avengers Infinity War (film): I really liked it and didn't expect to
The 6 original Avengers who conveniently happen to not have been desintegrated by Thanos's Snap will work together, getting help from various characters like Ant-Man, Captain Marvel, and maybe Adam Warlock, to steal Thanos's Time Stone from his Gauntlet to revive everyone (I think Ant-Man will go subatomic and sneak in the Infinity Gauntlet, but I am unsure of Adam Warlock's purpose or if he even is going to be in the movie. He is definitely going to be in Guardians of the Galaxy Vol. 3 at least. Now Captain Marvel has been confirmed to be the most powerful being in the MCU, far more than Thanos. That could play a big part).
Now Loki is in the cast for Avengers 4 so he will either be brought to life after that or not have been dead, or the Avengers will travel back in time to the events of the first movie, eother usong the Time Stone or Tony Stark's device at the start of Captain America Civil War, and we know for a fact Ant-Man will he there if that happens from set photos (maybe he has some relation witht the Reality Stone since they are similar). Either way his importance could be be to get Thanos's weak point by desguising into Gamora. Now a really cool thing that I hope they do is bring back every single villain in the MCU by using the Time Stone to defeat Thanos. Just imagine Hela, Jurmamnu, Ego, and all the gang fighting with Thanos and his Infinity Gauntlet with the Space, Power, Soul, Mind, and Reality Stones (I just realized this now when editing this comment but I feel like certain MCU villains represent the Infinity Stones).
That'd be so cool. But I suspect that that will bring back Thor's Hammer, Captain America will lift it and do something important, and eventually Thor will take back his original Hammer, giving the Axe to Starlord who will combine that with his Celestial powers to defeat Thanos, Captain Marvel either dealing the finishing blow or doing most of the work, cause she's a badass. Uuuuhhhh... I forget the rest of my guesses... But yeah happy ending and everything. But the movie will be dark.