Mog Station is overpriced.

[Ametrine]

I'd honestly wager that they'll bring those minions/mounts back in some form as time goes on. Given the nature of the rarity of it, it won't just be handed out, as some folks may want it to, but that in future seasons you'll still need to place, but maybe not as high. Perhaps it'll be a matter of, at worst, a set of rewards to choose from for the top ranks.

Or as cash shop items. :P

But otherwise I doubt that these exclusive items would return in their current form. Look at pre-order gifts, you can't get those again, not even in some really roundabout method like an extremely lucky retainer quick venture, unless they start coming out of the PotD trimmed sacks.