It's anyone's guess. I could see it going either way. I think it's overdue. How can you release a MBP that can't be upgraded with only 8GB of RAM in 2013? But with Apple introducing memory compression in Mavericks they may rationalize that 16GB isn't necessary.
I am already playing with Mavericks DP2, and I can tell you it does little to none compression. Don't expect miracles with this old feature, it will not double you RAM...