Did half of them disappear?
Not yet, last week's episode had a character named "The Candy Man" meet up with Daisy and give her some tech he had found to help Coulson live, he's dying from his agreement he made with the Ghost Rider to save lives from last season when he became the Rider for a short period to defeat Aida. During this meetup, he gave her the centipede tech that John Garrett had from season 1, not knowing she knew of it already. During their conversation, he said "Did you see the news about this crazy stuff going on in New York?" For which Daisy replied, "We don't get the news much...". So that was a small mention.
This week's episode, long story short but General Talbot used an infusion chamber to absorb the Gravatonium (sp?) and has now became Graviton. Him and Coulson go to an alien ship above Earth to confront them and speak with the Confederacy before the events of the "Destroyer of Worlds" happens. (Keynote...if you haven't watched this season...a shit ton has happened.) Anyways...they get to this meeting and they're told that whatever they have planned, it's too late. Thanos has already begun his attack on Earth for the Infinity Stones. This is when Graviton says he should absorb the remaining Gravitonium that's in the Earths core to become more powerful to assist the Avengers. Coulson realized that that would be the wrong move cause it would set off the chain of events that causes the Earth to explode, like they see in the first half of the season. Like I said, if you haven't watched it this season...a shit ton has happened.
Name dropped Thanos and everything....so...more than likely, after the next two episodes, we are going to see some dusting away of characters.
Sent from my Pixel XL using Tapatalk