Wouldn’t it be worth a try?
That of course, is what Hitech has to decide. IMHO, adding a new plane at this point, with the fleet we already have, would be very low on my priority list, if it were me. If I had a single dollar to spend, or hour of development time available, I could think of several other things that would probably be a better investment.
I would be using all my time and resources in development most likely to add new players, or develop new games that might attract a new audience. I'm not against new planes, it's just a matter of ROI at this point, when I assume resources are scarce.
But I might be wrong. HT might have decided he will never significantly increase the numbers in AH again, and doesn't think a new game is feasible. In that case, it probable would make sense to just spend to keep the current players happy and manage the decline. Maybe the glide slope gets him to retirement. That's not an irrational calculation.
Or maybe he could hire one of the previous modelers (they already know the process, tools, and requirements) to add a new plane on contract basis as a side gig. Or maybe a deal where the modeler works up an estimate of the cost he is willing to do it for and the community can setup a GoFundMe.
I have absolutely no insight into cost, or how long it would take to add a new aircraft from scratch (not a variant of existing, sub-models, animations, damage model, flight model, etc). If someone held a gun to my head and demanded a SWAG, I'd be thinking in the range of $10k.
How bad do you want that J2M?