Guild Wars 2

Few Fractal Packs I thought about:

The Fall of the Divine Fractal Pack:
1) Fall of Dhuum
Each player would take on the aspect of a God, who ever opened, would be assigned Grenth by default. The objective would be to defeat Dhuums army and bide time for the 7 reapers to prepare the realm for Dhuum to be locked away in. A small battle against Dhuum, once he hits 25% he banished into the realm. Another event to where you have to protect Grenth (person who opened) to ascend into God Hood. (fight off the last of Dhuums army.) End of Fractal.

2) Fall of Abaddon
Enough has been said about this, more or less, how he was rejected from the Pantheon.

3) Boss Fractal: Kill Abaddon.
For this fractal, you replay the final mission of Guild Wars: Nightfall, you Must Destroy the God of Secrets. Added content: Must protect Kormir while she absorbs Abaddons powers.

Guild Wars 1 Fractal Packs:
1)Kill the Lich, If you finished Guild Wars 1 Prophecies, you remember this mission…
Factions:

2) Kill Shiro Tagachi, If you finished Guild Wars 1 Factions, you remember this mission..

3) Boss Fractal: Kill the Great Destroyer

Historic Fractal Pack:
1) Fall of Orr : Everyone in the party is an orrian human, who’s duty it is to protect the Vizer while he researches a way to protect the nation from the charr. The fractal ends with a cut scene of the spell being cast and the nation sinking, the players wake up on a shore with a chest to open.

2) The Norn Exodus: The telling of what happened and the spirits involved, could be rather fun to see the other spirits that players could not transform into. All players would be transformed into Norns.

3) Boss Fractal: Ascalon Academy
Follow Prince Rurik into the cave and kill the Grawl and Vatlaaw Doomtooth. Completing this will trigger the Searing which will show the destruction of Ascalon.
Vatlaaw Doomtooth, being the Charr would be the final boss.