No Guild Wars 2 Expansion Currently Planned

Talking with IGN, ArenaNet's Colin Johanson has revealed that, while the company is looking into eventually doing an expansion for Guild Wars 2, right now none is planned, and neither is a sequel, though to be honest I'd have been surprised if the second option was on the table right now. Here's the relevant quote:
"Expansions are definitely something that we'll potentially look at in the future," he explained. "We don't have a timetable on it. We're open to it, but I think our major focus as a studio is making the living world concept as strong as possibly can for the players that we've got."

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But what about the possibility of another entry in the MMO franchise? Could we one day see Guild Wars 3?

According to Johanson, it's unlikely. He explained, "We want to be able to have teams that are literally developing new, innovative features that change the way that you play our game and grow that experience so it literally feels like you don't leave Guild Wars 2; Guild Wars 2 becomes Guild Wars 2.5 or Guild Wars 3 and it continues to grow."