In all honesty I do hope that Mickey is never replaced as the mascot - he's not a personal favourite of mine but he had tons of sentimental value to Walt, and to replace him would just be cruel!
But if, hypothetically, Mickey *had* to be replaced سے طرف کی someone else, I think I would go with Jiminy Cricket. He's very iconic, sings one of the most recognizable Disney songs, and perhaps also because he has had a fair amount of time in the limelight too. Don't know if any fellow '90s kids here had any of those Disney Sing-Along-Song tapes? But Jiminy Cricket was the "host" on those tapes and would introduce each clip. And he worked very well as the host too!