Indeed, all this was bad news for the Real Madrid squad when the La Liga competition was about to start and after that there were still players who were injured. His absence was unmitigated, even among them there were those who until the end of the season would not be able to strengthen Real Madrid. Kepa's arrival at Real Madrid is only on loan and of course it won't cost a lot of money. Ancelotti does like Kepa and even threatened Lunin's position, which was previously expected to get a starter when Courtois was injured. I think Ancelotti must be fair in dividing the rotation for these two goalkeepers.
Kepa is a smart goalkeeper and he is a Spanish too. It's good for him to return to Spain and play for a biggest club there. Real Madrid will have a good goalkeeper to replace Courtouis without big spending on transfer market. They won't have to wait for months to see good adaptation from Kepa because as a Spanish player who was called for Spain national team many times, Kepa already familiarized with some Spanish players in Real Madrid. In addition, he understands well about La Liga and tactical formations of Spanish clubs.
Real Madrid took minor risk by taking a loan from Chelsea and they can reach to a permanent transfer in the next summer if the goalkeeper satisfies Real Madrid.