For those discussing price, here's a breakdown of what it would cost to get those minis as singles if you didn't want to buy that pack on its release date (using MiniatureMarket for prices, though they admittedly undercut a lot of other online storefronts for prices except eBay):
Owlbear: $8.50 (cheapest) to $10 (most expensive)
Displacer Beast: $8 (cheapest) to $9 (most expensive that isn't out of print)
Gelatinous Cube: $8.99 (unpainted, not that you could really tell) to $12 (painted with custom base for trapping medium-sized creatures)
Mimic: $9 (there are many other mimics available, but there's only one chest-shaped one that's sold individually from WizKids boosters)
Intellect Devourer: $3 (cheapest) to $5 (most expensive)
Now, MiniatureMarket also happens to have this set for sale at slightly less than MSRP ($35.99 vs $40), but even if they didn't it would be more or less as cost-effective to buy the pack over the minis give or take a dollar and/or shipping, at least given what's currently available on the market for officially licensed D&D minis. Obviously that doesn't mean it couldn't be cheaper, and there's always alternatives, but the price is at least what you'd have to pay to get those 5 specific minis individually so I would deem it "fair", at least if you have an adventure in mind that needs those specific minis (I will not judge you if you just want to run the exact plot of the movie at your tabletop, we've all stolen from film and TV before).
It's a shame they went with the Intellect Devourer (I assume it's a secret antagonist of the film), I was really hoping they'd give us one of the dragons that shows up in the movie (except Themberchaud because he'd obviously be too big to depict as anything other than gargantuan with a ridiculous sculpt and oversized base). The black dragon looks kinda small so it could've been large-sized, and there's also a dragon statue that comes to life that would've made a cool mini too that's at about the same scale. C'est la vie though. They clearly wanted to sell monsters that are distinct to the brand, and it's a decent menagerie even if you'd have to struggle to use all of them even over the course of a single campaign.