technical term depends on how much of a fan you are and whether or not you want to be a jerk. The only term that has been officially used with any regularity is "combiner," which describes nicely what's going on but isn't terribly evocative. "Gestalt" is always a popular fan term, but it's also clearly the sort of term that bored 20-year-old psych student comes up with when talking about a cartoon online instead of doing homework.
You know what? Let's just say we're a supergroup, like Asia. That's easier.
So while you're queueing up "Heat of the Moment" and cursing me for getting that song stuck in your head for the next four days, it's time for Ask Massively, which this week features questions about the staff's opinions on games past, present, and future. Fun for everyone! And of course, you can send in your question to firstname.lastname@example.org, or you can just leave it in the comment field.