As you can see from the first pictures... I have had nice 'pitchers' for a couple of years... and as you can also see, I do not have any yet... every year I just put the bucket in the garage, and leave it there until it gets warm again. This year, I brough it in late (and lost the top of the pitchers to frost)... and have been able to take it back out early (so some of the base of the 'leaves' are still green)... but in all that time, I have never seen anything like a flower... what is it going to look like?
As far as taking it out of the pond... I thought this was a bog plant... so it should like having 'its feet wet'... shouldn't it?
The bulbous protrusion is a budding flower. Regarding the potting situation, I would take it out of the pond and add a nice, thick layer of live Sphagnum to the pot, or at least a little peat. That should retain the moisture a little better and contribute to the acidic conditions these plants enjoy.
BTW, your plant is gorgeous. I've always had a thing for carnivorous plants 