McCallum improved her Cheng block, but that hasn’t really translated to a better postflight yet. She’s pretty much right where she was at when she posted clips from last year. A lot of these Chengs are never happening, but I’d rather see McCallum’s than a Cheng or Amanar attempt from Wong.
IMO, the US judges have signaled that, Biles and Carey accounted for, they’d send Lee, McCallum, McCusker, and Hurd (the latter athletes spread between team and +1). Eaker and Wong have a shot if they go lights out, but GAGE can’t be trusted.
Skinner doesn’t have a chance unless she’s top 2-3 AA. I wouldn’t take her even if she were third, but I don’t think the selection committee would mind.