Slitherine

Nice feature that I could register my Slitherine DLC on steam to reduce the price to a reasonable amount. I love this game and while waiting for PC 2 I have now enough scenarios to spent my time.

I think that you'll find that your money was well spent. I've spent countless hours playing this game. Enjoy!

I understand that PzC II is in the works, but will there be anymore updates to the original PzC game?

I'd be surprised if any more official developments came out, but by the time you've played through East, West, Sealion, Soviet, Allied Corps, US Corps and Afrika Korps, you can either start again at a different difficulty level (or other personal challenge), try multiplayer or play mods. That should keep you busy until Panzer Corps 3 and beyond.

On the play time estimates for the Gold version, maybe compare this post and the following ones:
viewtopic.php?f=121&t=29212&start=160#p772482

The xls overview is also helpful...