Interview with the Live Team leader John Stumme – Part 1, Winds of Change - a small group (three designers [one does PVP], one programmer and two Q&A) maintains Guild Wars 1. An undisclosed number of volunteers test the new builds for the Live Team.
So as it stands right now, there will not be a part 4 to Guild Wars: Beyond, no seeing what happens to Elona (Guild Wars: Nightfall).
Guild Wars: Beyond:
1: The War in Kryta (Guild Wars: Prophecies, Guild Wars: Eye of the North)
2: Hearts of the North (Guild Wars: Prophecies, Guild Wars: Eye of the North)
3: Winds of Change (Guild Wars: Factions)
Part 1 requires completing either Prophecies or Eye of the North.
Part 2 requires completing part 1.
Part 3 requires completing Factions, does not require doing part 1 or 2 however part 3 does feature a character introduced in part 2.