Is there some sort of set release path that DB storebought mounts appear in?

I want to get a "fast" mount from the store, I remember on Agnarr before they changed the mounts that came out, you had the wolf ones I think as early as PoP?

Anyway I got the first mount available on Mangler, which isn't a "fast" mount and I'm looking to get a "fast" one. But I also want a different look than what's currently available.

I'm just wondering if there is a system to what will be released when so I can maybe see when something I want will come out.

Thanks!