I don't feel like I'm in a position to comment intelligently on whether the price of a particular kit is reasonable or not. The pricing of merchandise like this has to be based on a business decision by the manufacturer. Somewhere there's a balance between the admittedly enormous cost of designing, producing, and marketing a kit, on the one hand, and the modeler's willingness/ability to pay the price, on the other. Just where that balance lies I, at this point, have no idea.
I am fairly certain about two things in this context. One - this new Hasegawa Akagi will be an outstanding kit. (Surely Hasegawa has learned not to engrave cross-sections on the hull, like it did on the Nagato.) Two - I (with a mortgage, a car payment, a stepdaughter's student loan to pay off, etc., etc.) can't afford it. I might, just might, be able to justify spending that kind of money on a kit if I could honestly tell myself that I was going to start it immediately and work on it, extensively and exclusively, during all my spare time for several months or a year. But for a kit that would take me a few weeks - and in practical terms would go into a disgustingly large stash of unbuilt kits - No Way.
I wonder sometimes at the number of folks who, if posts in the Forum and on other websites are any guide, seem to be spending hundreds of dollars a month on kits. Surely I'm not the only model enthusiast who just can't do that. I feel like I probably spend too much on my hobby as it is. But I don't think I've ever spent $100 on a single plastic kit - and it's unlikely that I ever will.
These are great times - probably the best ever - for ship modelers, especially modern warship modelers. I do wonder, though, if the bubble may burst one of these days. What will the current economic crunch do to sales of those $100+ kits from Trumpeter, Hasegawa, Tamiya, etc.? I suspect a fairly high percentage of them are being bought by people who - like me - already have plenty of other kits awaiting their attention. Personally, I'm not the least worried about a recession's effect on my kit-buying habits; I've got enough in the stash to last me, quite literally, for the rest of my life. But if I were a dealer, I'd be worried. If all the guys with stacks of $100+ warship kits waiting to be built decide to build those kits, and buy gasoline rather than additional kits....
To each his own. Anybody who buys the Hasegawa Akagi will certainly have my best wishes. But it's just not for me.