And of course, the final shipping of the new six characters; Smolder and Ocellus.
After some thinking it over, I thought these two would be adorable together because of their conflicting personalities.
Much like how Thorax and Ember were able to help one another overcome their own weaknesses, I can see the same situation going towards Smolder and Ocellus. (And I already know many people who ship Thorax and Ember lol)
With Ocellus being timid and Smolder being brash, they could learn from one another to better themselves and each other. I can see Smolder being very caring, and patient with Ocellus. Although she isn't patient with most other creatures/ponies, she makes an exception for Ocellus because she knows how sensitive she is. And Smolder gives Ocellus the courage to overcome her shyness and let loose and be herself without feeling self-conscious about what others think about her.
Plus, the fact Ocellus can become anything to get out of a sticky situation was cool to Smolder, and I'm sure they'd experiment with different forms and such.. This also allows Ocellus to disguise herself as a dragon herself, and avoid possible conflict with the other, more unaccepting, younger dragons.