Didn't we have this exact thread like a month ago?
As far as I know, the standard is frozen on purpose. And what would a new version of the Common Lisp standard change/add? I think networking, multi-threading and ASDF should be added to the standard. But these things don't require a new standard (libraries/implementations already provide these).
Perhaps you would be interested in another lisp entirely, like Racket, newLisp, Picolisp or (when it is released) R7RS-large?