Marvel Post Infinity War
After Infinity War there are reported to be 20 movies planned for production. I can think of a few famous Marvel events that seem probable as a place to go afterwards. These choices are the ones I believe are most likely.
Secret War(original)
This was one of Marvel's first events and is well known as a fan favorite. I think that it's a great way to involve marvel's many villains in a greater depth and even bring a few back to life. Though, this one may be unlikely due to the amount of character's intergral to it Marvel doesn't own such as Doctor Doom and the Fantastic Four.
Secret Invasion
With it now being confirmed the the Skrulls will be in Captain Marvel, the next logical step would be to have ecret Invasion, the event in which Skrull's replace many of Earths heroes in an attempt to take over the Earth. This could create some great paranoia in which not even the audience will know who to trust.
Dark Reign
This is actually a great way to bring a Spider-man villain to the forefront. Norman Osborn is an amazing villain. Also, this is a way to continue the political themes of Civil War and Winter Soldier, and also unite Marvel's villains on an organized team.
Secret Wars(2015)
A truly epic event, and while it's unlikely due to rights issues and the lack of exploration of the multiverse, it's just so. much. fun. and. so. epic.
Secret Empire
A controversial event, but I have a feeling it will age well. It completly changes the marvel universe. At the same time, Hydra Cap is an awesome villain and an understandable one at the same time. It would have to retooled, but I have a feeling it could be very special.
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So those are my thoughts. What do you think? Tell me in the comments what you think would be best.