I agree RobertMC. There is a ton of potential here, and what's already available is enough to keep me in grins for a long time. I had missed being able to play SPWAW (but no longer!), and I think that this one will see a similarly huge range of mods and scenarios. Man, I wanna see some PTO stuff...
I think people have to bear in mind that software *can* evolve. Things can be added, tweaked and improved upon. Like you said, if people get behind this, we'll be playing this one for a long, long time, and see many version iterations to come.
I don't plan to work on any other game except Tigers on the Hunt - this is my long term goal, of course it depends on how well the game will do on the market. Otherwise, I'm keeping new features to myself :)