I thought Bobrova/Soloviev only guarantee one event due to Worlds Ranking Top 24. Yanovskaya/Mozgov will have one because they will be WJC. And they will be in Seasons Best Top 75 so ISU can choose them for second event. Bobrova/Soloviev will not be in it If they don't skate this year. Did rules changed? Super news If both guarantee two event.
I'm not sure if B/S would count as a come back couple - they had assignments last year but didn't compete, so does that count as "participating" or not?
“Come-Back” Skaters/Couples: Skaters/Couples who were previously seeded (placed 1 to 6 within the past 10 years at a ISU World Figure Skating Championships) and subsequently did not participate in one or more competitive seasons will be given priority consideration to re-enter the Grand Prix for selection of up to 2 assignments if they commit in writing to participating in 2 Grand Prix events and if such return is announced and confirmed by the date of the annual Selection Meeting.
All I can find for the Junior medalists is that they are "included in the selection process", but I think the year S/B turned senior they only had 1 event. Y/M are pretty high on the SB list though as well, but I can't see anything that would absolutely guarantee them 2 spots.
So potentially they could have to use all of the 3 host picks at Cup of Russia if they wanted to ensure B/S, Y/M and S/K all get 2 grand prixs. However, they also usually have the national champions/who ever is considered Russian no 1, which reduces the host picks they could use for those dance teams, as it's a maximum of 3 teams per country in any event.