It looks like final decision. When this news is talked about, an argument is most commonly heard - "its not getting into next release, its just getting into development branch and testing is still required to get into main distro".
Then we remind of the language being used all over. EGLIBC site says "Debian will be switching from GLIBC to EGLIBC". That seems marriage declaration. No scope for an engagement which may/may not lead to marriage.
Final Decision! Embedded Flavor in Open System! So the next version of my desktop distro may well be inspired by one running my washing machine. Child suddenly seem to be the father of man. Is the GOD of small things listening?