Speaking as a professional games developer, I can tell you that single RPGs aren't currently considered profitable by game publishers.The only way that's going to change (and even then, it might not change anything) is for people to continue to buy what is available, rather than pirating copies. Demand for something creates the market. When MM6-8 games continue to sell used for the same prices that new computer games draw, that sends a message to the money folks, provided it happens in great enough quantity, and provided it's brought to the license holder's attention.
You may not like what ubisoft is or isn't currently doing with the Might and Magic license, but they paid the money to have the option to use it. It's not like they got it for free, so when and if the timing is deemed right, they'll attempt to recover that investment with a new game.
