Probably not. I won't be surprised if someone doesn't add a patch though. From NEWS:
On the OS X Cocoa ("Nextstep") port, multicolor font (such as color
emoji) display is disabled. This feature was accidentally added when
Emacs 24.4 included the new Core Text based font backend code that was
originally implemented for a non-mainline port. This will be enabled
again once it is also implemented in Emacs on free operating systems.
If some symbols, such as emoji, do not display, we suggest to install
an appropriate font, such as Symbola; then they will be displayed,
albeit without the color effects.
IMO: this is the least important thing of this week to me. It certainly doesn't deserve the "Emacs Hate MacOS" subtitle.
