I suspect that EU 2 is on the way.
Of course it is, but even being sure about that (it's just a hunch mind you, I have no inside info) I decided to purchase this first game on day one because:
1) Being very vocal about Paradox getting onboard, so I thought I'd support GOG for achieving it
2) I have no prior experience with the series, so this is a perfect moment to try the first installment without feeling it outdated. Seasoned players seem to agree that each game is better than its predecessor, but for a newbie like me, man this first EU is incredible, I am having a blast.
3) I can take it as a training for further versions
4) I really couldn't wait any longer :D
Of course, if I had budget issues I'd look at it differently