Team A
Simone Biles
Gabby Douglas
Bailie Key
Maggie Nichols
Aly Raisman
Kyla Ross
Before Championships, this was by far the most common team on the gymternet. Almost everyone agreed this was the team going to Glasgow in October, these were the only girls USAGym brought out for interviews after podium training! This is a really strong team, even with minimal use of sixth member Kyla Ross!
I would imagine the lineups would look like this (qualifying in italics);
Vault- Key/Douglas/Raisman/Nichols/Biles 47.060
Bars- Raisman/Nichols/Key/Biles/Douglas 45.360
Beam- Key/Douglas/Ross/Raisman/Biles 44.587
Floor- Nichols/Douglas/Key/Raisman/Biles 45.628
Total 182.635
The only problem with this lineup, as strong as it is, is that only Douglas and Biles are doing All Around. I could that second All Around spot going to anyone else on this team, depending on who looks the best in training and at Selection Camp. The beam weakness really jumps out at me, not that 44.587 is a bad score, but when you're consistently averaging over a 15 on every other event (including bars), you notice when you're not.
Team B
Simone Biles
Gabby Douglas
Bailie Key
Madison Kocian
Maggie Nichols
Aly Raisman
Vault- Key/Douglas/Raisman/Nichols/Biles 47.060
Bars- Nichols/Biles/Key/Douglas/Kocian 45.837
Beam- Key/Nichols/Douglas/Raisman/Biles 44.462
Floor- Nichols/Douglas/Key/Raisman/Biles 45.628
Total 182.987
The only place the Kocian helps is on bars, and in this scenario, Nichols isn't used in the team final. This team is about .35 better than Team A, as the hole created by Kyla Ross not being used on beam is filled by Kocian's huge 15.567 average on bars.
Team C
Simone Biles
Gabby Douglas
Bailie Key
Maggie Nichols
Aly Raisman
MyKayla Skinner
Vault- Key/Skinner/Raisman/Nichols/Biles 47.060
Bars- Raisman/Nichols/Key/Biles/Douglas 45.360
Beam- Key/Nichols/Douglas/Raisman/Biles 44.462
Floor- Skinner/Nichols/Key/Raisman/Biles 45.628
Total 182.510
This team is about a tenth weaker than Team A, and about half a point weaker than Team B. While Skinner adds a potential medal on vault, she doesn't even contribute to the team on her strongest events! I think this is the least likely team of all the possibilities.
Team D
Simone Biles
Gabby Douglas
Bailie Key
Magge Nichols
Aly Raisman
This team won't happen because it is only five members. I just threw this in because, regardless of the sixth member, the core of the team will contribute mostly in Glasgow. I included this because in reality, the sixth member is just an added bonus over the other teams competing against the United States.
Vault- Key/Douglas/Raisman/Nichols/Biles 47.060
Bars- Raisman/Nichols/Key/Biles/Douglas 45.360
Beam- Key/Nichols/Douglas/Raisman/Biles 44.462
Floor- DouglasNichols/Key/Raisman/Biles 45.628
Total 182.510
This team scores exactly as Team C because Skinner wasn't used in the final in Team C. Just putting it out there, but this team would've won last year in Nanning. Just goes to show, that Team USA is looking stronger than ever with 2-Time Defending World All Around Champion Simone Biles, the return of Olympic Champions Aly Raisman and Gabby Douglas, the return/ improvement of Maggie Nichols, and the 16th birthday of Bailie Key. It doesn't really matter who is the sixth member at this point, because Team USA is looking strong enough with 5 girls, which is very promising for next summer.