#3 Current WWE Women's Tag Team Champion Natalya

One-half of the WWE Women's Tag Team Champions, Natalya is one of the most tenured and respective female performers on the WWE roster.
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Natalya has been a WWE Superstar since 2008, meaning she has been a main roster wrestler for over 13 years. Because of her vast experience on both Monday Night RAW and Friday Night SmackDown, Natalya is the perfect person for a new WWE Superstar to face off against upon their arrival on the main roster.
Shotzi Blackheart herself is a former tag team champion within WWE. Blackheart was part of the second ever NXT Women's Tag Team Champions with Ember Moon on the black and gold brand. Therefore, she could be considered as a tag team specialist herself.
Perhaps Shotzi Blackheart could arrive on the main roster and challenge both Natalya and Tamina's ability as WWE Women's Tag Team Champions.
Shotzi Blackheart being engaged in a storyline with a widely respected WWE Superstar such as Natalya would give the former NXT Superstar instant credibility by being paired immediately with such a respected veteran such as The Queen of Hearts.