I don't tend to care about spoilers, but they're more than just "how will they beat Thanos?" If Superman made a cameo in this movie and someone told you about it, that would be a spoiler. Black Widow dies in the first 10 minutes. Spoiler. Antman gets out of the quantum realm in the first half. Spoiler. Miles Morales is in this one! Spoiler. And so forth. Basically anything that gives away an emotional surprise can be a spoiler. For comedies, jokes are often spoiled in the previews.
I didn't know Hawkeye would be in this movie at all, but now that surprise has been spoiled. Not a big deal, but it probably would be for some.
Welp, can I just sleep in until April? And yeah, it moved. Gotta say Marvel's run has been nothing short of outstanding. This is what Star Wars/DC Comics should have been. Those folks should take notes if they ever want to move the needle like Marvel has.
I suspect this as well. It wouldn't make sense after Fury's contacting her at the very end of IW. I'm actually looking forward to seeing her movie. Curious to see if or how they'll tie her movie into Endgame.
Also, IIRC, Agents of Shield's next (maybe last?) season will be released shortly after Endgame. I wonder if there will be any tie ins like they've done on occasion in previous seasons.