A little background here.
This is a Cattleya mossiae yellow lip x coerulea 'Pablo'
It bloomed for me, for the first time in May. As the flowers faded, this is what has remained of the bloom spike, and it's continued to get larger.
My initial thought was that it was pollinated? And is trying to seed? Do they even do that?
And what should I be doing with it now?
I've never seen anything like this on any of my other Catts.
This is the plant in bloom

And this is today


Any ideas?

Looks like a nice fat seed pod!!
Now unless one made a really interesting cross of interest, I would remove it. Or do you want to send it out to flask the seeds?
@BigBill, there is nothing gained here by growing these, so cut it off, right!

I would recommend that you just cut it off. It is simply, clean and quick. Treat cut with cinnamon powder.

You didn't see this before because the flowers were not pollinated or the cross was not successful.

In a Cattleya seed pod like this you have the potential for over 1 million seeds, one million plants. But the process is more complicated and costly. You could even cut it back to 500 seedlings but then, what do you do with 500 seedlings. If you are going to choose the option that produces just 2 dozen plants ultimately, the cost would be ridiculously expensive per plant.
Commercial growers who breed their own plants typically have 2,000 or 3,000 seedlings created. But they have a network to disperse them and to make a nice profit. But for the hobbyist orchid grower it is just so much easier to remove the pod.
You have a stunning plant!!!

both so much!
I had a sneaking suspicion that that is what it was, but I'd never seen it up close and personal on any of my others. Better to ask, and be certain, then to cry about it later.
It's been cut, and dusted! Now all that energy can go back into doing what I want it to do...Grow, and bloom another time!
Again,

You are very welcome!!