In the long run, I would hope they do, but that would probably depend on the market at that point in time and whether or not the company wanted to continue with Mmo's or go in another direction by then.

If they started reorganizing dev teams and gearing up for a new mmo project while I'm still playing and enjoying this one, i'd probably feel a little bit abandoned but I'd get over it, pretty much how I felt last time they did this. If anything, I'd probably be a little quicker to give the new one a try and see how I like it.