The current plan is for WWE to play up the friendship between Natalya, who just came over from SmackDown Live in the Superstar Shake-Up, and Ronda Rousey. In real life, Natalya and Rousey have been training at the Performance Center. Before WWE announced her signing, Rousey would train with Natalya after hours in Orlando to prepare for the mixed tag team match at WrestleMania. Their friendship actually goes back to 2015 when Natalya would travel to California to train with the likes of Josh Barnett, Rousey and the MMA Horsewomen.
The storyline idea is to play up the Natalya-Rousey friendship on Raw and then Natalya will turn on her. Basically, fans will find out that Natalya has been jealous of the attention that Rousey has been getting. I don’t know when they will have their first match but plans are for a multi-match feud that would likely culminate at SummerSlam.
So yes, Natalya is turning heel again very soon.