Alaba is not close to Real Madrid after all, he is a free agent who was very close to sign for Real Madrid but now we have more rumors coming from the Premier League.
I know isn't a reliable source for news but I didn't see other news deny this.
Benzema could get back to Lyon after leaving in 2009 and he can stay at Madrid but all going to depends on Madrid results on the end of this season.
I have checked the Transfermarkt but didn't see even a rumour about Alaba reaching an agreement with Real Madrid. I see that the last rumour was about Chelsea wanting him in the last days of 2020. If your source turns out to be correct, it is a good transfer for Real Madrid.