The hospital petitioned that a Guardian be appointed to my mother. Is it possible for the court to assign someone else?

THE HOSPITAL PETIONED FOR A GUARDIAN TO BE APPOINTED TO MY MOTHER. i AM HER DAUGHTER AND HAVE BEEN WITH HER EVERY DAY AT THE HOSPITAL. I HAVE A LAWYER WHO WILL GO TO COURT AND REQUEST I BE APPOINTED AS GUARDIAN. IS IT POSSIBLE FOR THE COURT TO ASSIGN SOMEONE ELSE, AN UNKNOWN IF YOU WILL? THE HOSPITAL DIAGNOSED HER WITH HAVING "SOME COGNITIVE ISSUES" DEMENTIA.