Plague toad riders in the latest trailer?

I think I have spotted plaguebearers riding on plague toads in the trailer.

This timestamp, on the right you can see a few plague toads hopping around with SOMETHING flailing on their backs. https://youtu.be/dnIEzBpsfDE?t=123

This timestamp, if you look at the top of the screen, you can see feet on the plague toad. First few frames you can see the rider holding a blade like the one plaguebearers use. https://youtu.be/dnIEzBpsfDE?t=145

Lastly, look to the left side of this image. You can see a plague toad with a clear plaguebearer trying to stay on. https://preview.redd.it/ftv2hh5ihd081.png?width=1920&format=png&auto=webp&s=bdc7ad638e9d737f0fb80ff2ede48ed92366c310

I sure hope Heralds get a plague toad mount.