There hasn't been anything mentioned for us residents of Mickey Avenue, but we all know that they don't exactly tell CMs anything really and sometimes the internets catches things quicker than we do.
Either way, I see no problem with them actually closing the street. There is nothing on there from where the bathrooms next to Toy Story are to the entrance to the Backlot Tour (Besides the Movie Trailers which could easily be closed and have the Playhouse characters M&G elsewhere). Merchandise could also be moved and as far as I know they sell the same crap in the Animation Courtyard anyways..
The days are numbered and soon we will no longer have our beloved Mickey Avenue with not a single person walking through there and hoping no one comes into any of our attractions for the remainder of the day...