I do wonder where these quotes by Jackson and Read are coming from? It appears to me that the quotes were taken from somewhere else, perhaps another interview/documentary/article not related to a movie It's not like the both of them and the LBI Entertainment held a formal press conference to announce this or even a book deal. I think those may come later when the PR engines are started and the project get closer to completion or release. As far as I know these hasn't been any kind of official statement or interview with either Read or Jackson other than the brief statement Karen had on the steps to the courthouse.
As far as Yannetti and Alessi.... I believe they are making the rounds with some of the LawTubers out there that supported and brought attention to their cause as a kind of 'Thank You' for their channels. In my opinion they have not appeared on Turtle Boy's channel because he is still in the middle of his court case with the CW and we know that anything he says can and will be used against him in court. Yannetti himself made a statement about Aiden and the respect and admiration he has for his journalism and his help in bringing attention to JOK's murder. There is of course some unfounded speculation going on that there is some kind of rift between Karen's Team and TB by the usual suspects who have their hatred of him, but even TB himself made a statement and flat out denied any and all allegations about said rift.
Jackson may have been working in LA on these book and film deals but the fact is we just don't know. There was footage this week of Karen taking out the garbage of all things by someone who was obviously stalking her in Boston hoping to get what, an interview? ( throw this in the lawsuit how all those lying people have ruined her quality of life!!) Again, we just don't know who is doing what and where. Jackson has been away from his family who lives out on the West Coast for lord knows hos' long? I think it's perfectly natural to want to get away from all this spotlight and speculation that has consumed large amounts of his time. Throw in the time difference between coasts and it's probably difficult to time everything with everybody on each of their shows and schedules. Whatever it is, I'm sure EVERYTHING is better now in all of their lives that the pressure is off and Victory is in hand.