If I were, hypothetically, Fox management and I knew everything we know and I had big questions about this production (and/or had already decided to cancel it), I think I'd keep Trank in Baton Rouge doing his thing and putting the big pieces in place.
Personally, I think I'd draw the line at sending Kinberg down there and having him play along and/or ignorant of what was going on. And that's why I think they really are committed at this point.
. . . BUT, just because I would draw the line at making a fool of Kinberg doesn't mean that Fox management uses the same moral compass as I do.
So I don't completely discount the possibility that something very fishy could still be go on, but like you, I'm resigning myself to the idea that this is going to happen.
But Kinberg's comments - particularly those related to Doom that indicate they intend to make a similar mistake to last time . . . and could still give us Goat legs

- make me less enthusiastic than I've ever been.
And I think 'less enthusiastic' is understating it. I'm getting close to completely losing interest. Kinberg's comments, combined with everything else we know, are making me feel like I made a bad choice in ever being an FF fan.