The presence of Kylian Mbappe in the Real Madrid team I believe will make the manager to change from the playing formation he used last season so he can accommodate the France striker in his regular starting XI. Real Madrid last season mostly played four midfielders while playing a front two of Vinicius Jr and Rodrygo as Bellingham was allowed to play in the false 9 position but with the arrival of Kylian Mbappe, I expect Real Madrid to go back to a front three attackers and three midfielders.
Carlo Ancelotti have proven over the years with his incredible success in football that he has all it takes to manage any team regardless of how talented it appears to be so I believe he already knows what to do with the Real Madrid team
What is clear is that for next season Ancelotti will not be able to play 2 strikers because after all, with Mbappe's capacity as a targetman it is still possible, especially with Vini and Rodrygo who are more comfortable in the winger position so that indeed 3 strikers can be more suitable.
It's just that this is Ancelotti where he is sometimes always unexpected to do a scheme and formation including placing players. We can see last season when several defenders were injured he even used Camavinga as a full-back and Tchouameni as a center-back more often than putting them in their original positions.
Last season we also saw Jude comfortable in his new position as a player behind the striker whereas previously at Dortmund he was an attacking midfielder.
This season could also be like that again where Ancelotti does an interesting thing by placing players who he thinks deserve to be in a new position later.