Common Lisp isn't even a good programming language. There's nothing in CL that isn't in a ton of other languages now. When it was being designed it was way ahead, but now it's just way behind.

Maybe you could take CL as a foundation, introduce modern features and uniformity to the language, remove some of the insane complexity, tame the unhygienic macros, and come up with a pretty good language. Since about 7392 different flavors of scheme have tried to do this and mostly failed, I think this is very unlikely.