Found a gigantic queen cell...

[The Bix]

Looking through one of my hives today and found a very big queen cell in the center of a frame in the bottom deep hive body.  It was not anywhere near the bottom of the frame and was the only queen cell I found.  The hive has drawn lots of drone comb (foundationless) and as a result I have lots of drones in the hive as well.  The queen is doing well, has a decent laying pattern, lots of brood.  And there is also plenty of room in the double deep.  I'm guessing this means that this is a healthy hive that is not planning to swarm, but working to supersede the queen.  Thoughts?

[G3farms]

could be the gals are seeing too much drone brood and decided to change queens.

[The Bix]

But, the workers build the drone cells, not the queen's fault, no?

[Brian D. Bray]

But, the workers build the drone cells, not the queen's fault, no?

True the workers build the combs, the queen lays the appropriate egg in each type of cell.  But when a queen doesn't lay enough eggs, lays too many drone to worker egg ratio, or isn't producing sufficient phenomones to satisfy the workers will replace the queen. 

Prior to a reproductive swarm the drone to worker ration might be as high as 40% but after that it is maintained at about 20% for the remainder of the season, even if the  hive swarms again.

[Michael Bush]

When the bees don't want more drones they fill the drone cells with nectar to keep the queen from laying in them.

[Dallas Don]

The colony that decides their queen is not up to the task at hand starts supersedure promptly. After starting supersedure cells the old queen is expendable.

[The Bix]

Based upon what I've described, should I be concerned about a swarm or is this only supersedure?  I realize that a supersedure and swarming are not mutually exclusive.  I'm just concerned about my neighbors freaking out because of a swarm.

[Michael Bush]

The circumstances appear to be a supersedure.