So today, I saw this
Since the launch of Guild Wars 2, NCSOFT and ArenaNet have released more than an expansion’s worth of content, regularly hosted special events like Halloween, Lost Shores and Wintersday, introduced players to the retro-goodness of the Super Adventure Box, and engaged players with the Living World philosophy, all the while continually updating and tweaking the game experience. There are record numbers of people playing Guild Wars 2 and the recent WvW and PvP updates are just the first drops in a shower of new updates.
Emphasis mine.
Which brings to mind a certain eight year running MMO that just released an expansion around the time GW2 came out, which had several new zones, a new class, a new race, dungeons, raid content, etc, etc. It seems far meatier in simple terms of content and overall development effort than what what GW2 has released, and not only that, but substantively and permanently added to the game world itself.
Then, I remembered this
Saying something like “expansions worth of content” means different things to everyone, and is nearly an impossible goal to meet expectation wise since everything expects something different, which is a big part of why marketing stepped away from that plan very quickly after asking us to use it when speaking to the press/fans.
Just to point this out, it seems like you are still hyping up your achievements post-launch beyond their scope. People do have a fairly commonly accepted idea of what is worthy of being an expansion, and if what you plan on releasing as a paid expansion is of the same scope as the updates we have gotten so far, I think it would be a poor consumer decision to purchase it.