Iron Sky looks like huge fun. It is a crowd-funded Finnish production, so it will probably not receive widespread theatrical release. Look for it on Blu-Ray (or whatever). Another couple of interesting recent sci-fi films from overseas that are harder to find, but worth a look, are the Japanese Space Battleship Yamato and Tamil's Endhiran (Robot).
I own a Hindi copy of Endhiran on Blu-Ray, and it is one of the most entertaining movies I have seen in years. My kids went nuts for it. It will probably eventually see an English dub, but is currently tied up in litigation. (Is that getting to be a tired mantra or what?) IF you decide to chase it down, be prepared for a uniquely Bollywood take on sci-fi (Every Bollywood film is very long and very musical). The Hindi Blu-Ray is excellent, although you have to use the 5.1 audio track (The DTS track is missing a channel). I think the Tamil version is fine. From what I hear, the DVD's are only of fair quality, and annoyingly watermarked.