WARNING, DON'T READ IF YOU DON'T WANT TO BE SPOILED
An acquaintance who is involved in the business, showed me proof (can't show you because I don't want to get him/her in trouble), told me a lot of the stuff in this spoiler isn't true. He/she, in the beginning, refused to tell me anything but he/she finally responded when I sent him/her this info. I didn't even expect him/her to respond. Here's what he/she told me:
Laughed at some of the alleged tea especially at what happened to Captain America. His/her reaction was "how can people buy into this shit?".
Black Widow doesn't die but something serious happens.
Okoye has a bigger part than expected but it's too spoiler-y which is why Disney isn't showing anything featuring her as it's meant to surprise.
Fat Thor is a running joke throughout the film.
Nebula fights Evil Nebula in the HQ battle.
Bruce and Natasha break up at the end when Betty (Liv Tyler) shows up and Natasha realizes Bruce still has feelings for his ex.
Two Avengers die.
Katherine Langford is playing Cassie Lang.