I would prefer to see a single concise Core Rulebook, and that would mean making some serious cuts. That, by extension, means Dragonborn being dropped from the core.
If WotC choose not to go in that direction, then I think they're seventh on my 'wish-list' of races: Human, Elf, Dwarf, Halfling, Gnome, Half-orc, Dragonborn, Tiefling, Half-elf, Eladrin. So, wherever WotC choose to make the cut would determine whether they should include them or not.
I certainly think that they should aim to get Dragonborn (and the rest) into print ASAP, and potentially should have them in a web enhancement right from the outset.