On the Mariinsky's website, Irma Nioradze and Igor Zelensky are no longer listed as Principals. I believe this is a very recent change (this week) on the site.
It makes sense, since neither dancer has been dancing with the company, but I wonder if this means someone is being moved up.
The male principal roster is very small and weak for Mariinsky. Kolb has become a character dancer, so he no longer dances principal roles. Ivanchenko should have retired a long time ago, leaving only two worthy principals in Shklyarov and Korsuntsev.
Analyzing possible promotions to principal, 1st soloist possibilities, are only two since Andrei Batalov is not liked by Fateyev adn Kuznetsov does not dance principal roles. That leaves Sergeyev, who I would support as principal, but not likely, and Askerov, who I do not see as a 1st soloist, but he has a wealthy father and wealth can do much in post soviet Russia. Therefore, I expect Askerov to become the 5th male principal. Askerov's father is one of the most powerful individuals in Azerbaijan, maybe the most powerful, being on Azerbaijani TV often.
I see little hope of 2nd soloists jumping to principal and no hope for coryphee jumping to principal, but there are several worthy principals in the 2nd soloist and coryphee categories.
I will list the names, but they have no chance of getting principal status now and obviously coryphee have no chance of moving to 1st soloist.
Ermakov, Zyuzin and Stepin are all worthy of moving up to 1st soloist and if they were 1st soloist now, I would say all 3 were possible principals, particulary Stepin, who I feel is currently the best Mariinsky dancer.
Coryphee have two potential future principals in Tkachenko and Alexei Popov, but Tkachenko needs to be given Basilio and Solor among other roles to have a chance.
In the corps de ballet rank, both Ivkin and Latypov are potential future principals. It is shocking that Ivkin is still corps de ballet with the best jumping ability at Mariinsky, but then his Vaganova partner, Marchuk is even more shocking as a current corps de ballet girl.
Regarding the women, Fateyev has opened the door for his prized collection, his precious Skorik, to move to principal.