I'd love to see a new style of band; I don't know what that might be. I've always thought that they could do more with molding multiple colors together like they do with the Nike bands - maybe something with fluoroelastomer still, but a modified shape, or colors molded together in different ways. I'm a little sad that woven nylon went away. Maybe an entirely new material?
I don't think they'll be bands for a new Apple Watch model. I think the S5 is working out nicely and they'd do well to make an S6 with additional modest improvements and focus their big design energy elsewhere.
I do think it's possible that either this is all just someone at Target entering test data or messing around, or it's legit entries with made up names for watch bands that are indeed coming, as sort of a placeholder, in which case they don't have to be indicative of precisely the right number of variations, etc. I think there'll be Spring 2020 bands released soon (possibly before the rumored March event), with 2-4 each of Sport Bands, Nike Sport Bands, Sport Loops, and Nike Sport Loops, with a possible new leather color and/or Hermes color scheme, just the way we usually see, several times a year (it always feels like it goes with the seasons but never quite ends up being four times a year).
In any case, I fully expect any new bands (these and in the future) will be compatible with the existing watch/band mounting system, for two reasons:
One, they'd be foolish to change that, because people buy a lot of bands (sure, we buy them by the handful, but it seems like there must be a lot of people out there who have a watch and have bought 2 or 3 additional bands), people feel confident that their existing bands will work with a new watch and vice versa, and if Apple changes it (without a VERY good reason), what they gain in selling some new bands will be offset by shaking that confidence of being able to re-use bands, and they'll see a drop in people buying "collections". And Apple is pretty good at playing the long game rather than going for short term profits while "killing the golden goose".
And, two, the Apple Watch was designed by a bunch of designers who fancy themselves to be watch aficionados, and they had lots of time and resources to come up with their ideal attachment mechanism, and they knew that they wanted a design that would last for a long time, through many revisions to the watch itself (Apple has had experience with designing connectors and then running up against the limitations in said connectors and having to replace them with new designs). So, they came up with a design that they thought they could live with long-term. I think it'll be around for quite a while to come.
That... was more than I meant to write.