What I'd like to see is the Jo-han bodies and engines (they were typically excellent) merged with better interiors (truly hit or miss) and chassis.
That is perhaps my #1 gripe with Jo-Han kits (the second being glass so thick it could seemingly withstand a direct hit from a 12-gauge) is the shallow interor tubs. If it would be at all possible to tool up new, better detailed tubs, perhaps even with separate seats and consoles where applicable, that would be a huge plus in my book, and would no doubt tempt me to buy more from them than if they were straight repops with the original, shallow tubs. Keep the dashes, though- Jo-Han dashes were just as good as anything from the period, and still hold up well today. I'd still be very interested with the original shallow tubs, or no tub at all, but I guess we'll see what the market will bear out.
Personally, a fresh, new tooling of anything is better than anything Johan made other than the Chrysler Turbine car. Would I like a '65 or '66 Satellite (Belvedere) Oh, I've joked about this a couple times, but...a Studebaker would be cool. Maybe another '59 or '60 Lark? Or dare I hold my breath and anyone make a '64-'66 Lark type (maybe a Daytona???). A detailed '56-'58 Golden Hawk? That G/H could be the basis of a '58 Packard Hawk(?).
I'd be all for a Stude kit or ten. I hope that infamous list Moebius has had a Bullet Nose on it- if the Hudson and Chrysler do well, maybe that will be their next project...
I'd be happy just to have the Lark back (out of scale or not), and if they could expand or create tooling for other variants, so much the better. I'd really love to have a Champ pickup, as I've all but given up on ever finding a Premiere kit in workable condition for a less-than-stroke-inducing price.