#3 vs. Shayna Baszler

It isn't uncommon when best friends go at it in a WWE ring, meaning this could be a real possibility. Ronda Rousey and Shayna Baszler make up one half of the Four Horsewomen of MMA, meaning there could be a great potential story to tell for a match between the two of them.
Both Rousey and Baszler enjoyed dominant spells as the Champions of RAW and NXT respectively, but the latter has lost a bit of momentum since moving to the Red brand. If these two were to face off, it would almost certainly turn the Queen of Spades into a permanent player in WWE.
This could possibly even be Ronda Rousey's last match in WWE, putting Shayna Baszler over on her way out. The biggest professional gift she could give to her best friend is a submission victory on a big stage.
The match would be brutal, as one would expect from two former UFC fighters. And the fact that Rousey and Baszler are best friends means that they might go the extra mile to make this match great.