Yes there can be 3 yokozunas. As I understand it, it's very unlikely for Aonishiki to be yokozuna after this tournament, but after next tournament it is possible depending on what happens. See here: https://en.wikipedia.org/wiki/Makuuchi#Criteria_for_promotion
I also want everyone to win, but most of all for Aonishiki.
now
can there be 3 yokozunas?
Yes there can be 3 yokozunas. As I understand it, it's very unlikely for Aonishiki to be yokozuna after this tournament, but after next tournament it is possible depending on what happens. See here: https://en.wikipedia.org/wiki/Makuuchi#Criteria_for_promotion
indeed