Hey Dr. Verylong- I have not read/heard anything about that. I assume you are talking about a brand new watch in place of the recently released 177L. The 177M is the same watch as a 177L except that it comes with a leather strap (I think Panerai includes a second rubber strap with it if you buy it new).
If you in fact mean a brand new, updated 177, that is different than the one released last month, I would say the chances of that are .000001%