A prediction
A prediction vis-a-vis Delta 25 production:
If you do indeed put this film into production -- in any format, but particularly the higher volume formats (i.e., rolls -- 35mm/120/220) -- you will experience a
massive burst of initial sales -- heavy emphasis on the word "initial."
Your temptation will be to base
future demand projections on the
initial demand volume. If you do, you will likely fall prey to -- and create -- a self-fulfilling prophecy.
The initial burst of purchases will be going straight to the freezer, as users, having been burned repeatedly in the past by other vendors, perceive a likely one-time opportunity to stock up on an emulsion type that they have lusted after for years.
Your
mission would be to assure the user-base that you really will be supporting this emulsion on an ongoing basis, so that they can buy as they go, rather than trying to fill up the freezer with a "forever load" today.
This will naturally be an uphill battle, and you'll be torn in two directions -- on the one hand, you will have the customers, incredibly gunshy, viscerally reluctant to "trust"
anyone. On the other hand, you will have "corporate" telling you what a great goldmine you've got in this product, "Why, look at the
demand! It's truly staggering! We've
got to ramp up production!"
If they
do ramp up production in the wake of an initial "mad minute" of freezer-purchase stocking up, they will be left reeling when they are stuck with a massive amount of unsold inventory, as demand slacks off, due to the customers having flattened their wallets as they filled their freezers.
If Ilford "corporate" is like
most "corporate" mindsets, what will likely happen is that they will decide that they've misread the market -- or, that the market "was fickle and doesn't really know what it wants" -- and, issue an order for immediate cessation of production of the line. Once they've discontinued it, they will either have a fire sale on the remaining (possibly massive) stock, or, more likely (IMO), they will send it to salvage, to strip out the silver for use in
other products to hopefully sell at NON-firesale prices.
The idea would be that a roll of "firesale"-priced Delta 25 would represent a roll of some
other film -- at
normal pricing -- that was lost. In which case, it would make more sense to destroy the Delta 25 stock on hand, rather than "move it" at fire-sale pricing.
This is all speculation, but I don't think it would be the first time a product experienced that sort of "demand-whiplash".
The madness that is traditional photography -- in particular, the categorical loss of virtually all ("mainstream") slow-speed/ultra-fine-grain films -- IMO makes this kind of scenario almost inevitable -- which I consider tragic, given the fact that you are actually considering producing such an emulsion.
So, my suggestion, to reiterate, would be to work extra-hard to assure the market that you really
are committed not only to B&W photography, but, to LOW-speed materials, too.
If you can convince the market that you really
will be there for them with this product on an ongoing basis, then they will
not go on a mad buying spree the instant it hits the shelves, and they will
not shoehorn as many rolls into their freezers as possible.
You'd naturally have to convince "corporate" of the wisdom of a marketing strategy aimed at
reducing (initial) sales. In order to do that, you'll need to explain to them the
reason for the hoarding -- and the fact that it
is "hoarding", as opposed to "high demand". (Hoarding is a one-time event -- high demand is something you create, build to, and sustain. As the puppet on the kids' show says, "One of these things is not like the other.")
If you can pull off this multidimensional juggling act, I think you will have a world-beater on your hand -- and, a product that will serve as a "gateway drug"

for your
other products. People whose first exposure ("no pun etc.") to Ilford film consists of a few rolls of Delta 25 will be wowed, and then go out and buy your
other products too. At first, they'll try one or two higher speed films -- then, liking what they've seen, they'll try some paper, and then chemistry too. (You
are going to be selling chemicals, right?)
Well, there's my two cents, worth their weight in electrons. Hopefully some of it will make at least
some sense, and, even more hopefully, it may help to see Delta 25 become and
remain a viable product!