I would wish to bring back not just a blend but an entire category that seems to be under-represented: straight, strong, untoasted, un-cavendished, un-cased burleys, with toppings and not. Right now, to my knowledge, this category is represented by only 3 tobaccos: Five Brothers, C&D Dark Burley, and C&D white burley. The last two (especially the very last) are sold as blenders. I might also put Crooner into this category, as it is a strong straight burley flavored with deer tongue.
To be specific, I would like see the strong OTC tobaccos that I have read (somewhere, long ago) used to compete with Five Brothers.
I would like to see lots more strong straight burley ropes and plugs. The only one I know about is Cotton Boll twist.
I would also like to see more of the old style continental pipe tobaccos--strong air cured stuff like Caporal. Right now the only one I know about readily available in the U.S. is the boutique-ish semois