Should I buy a Dahon or wait for a Tern folding bike? I am currently thinking about buying a Dahon folding bike to replace my existing Dahon folding bike. Brompton and other marques are not really a consideration because I like Dahon for many reasons - sensible gear range, better hinges (they owned the patents) and they are also possible to fold without a degree in engineering (unlike Mezzo).

However, in researching if I will be able to get an Alfine 11 on a Dahon any time soon I discover that Mr Hon's estranged wife and his son have taken the intellectual property of Dahon plus a few of the factories and setup this new company called 'Tern'. Meanwhile, Mr Hon has gone to court and tried to get a restraining order on the new upstart.

'Tern' could be the new Dahon and take over the UK distribution, in which case I would be stuck for spares down the road if I was to get that new Dahon Mu now. So, what do I do, get a Dahon or wait for a 'Tern'?

http://www.bikebiz.com/news/read/us-federal-judge-denies-dr-david-hon-s-request-for-tern-to-quit/011621
I think that the only possible answer for this is to wait and see. If I needed to buy a folder now, I'd stay away from Tern until they became a more established company. While it's possible they may take over the market and distribution channels, it's also possible that this new company may fold (no pun intended). 

Dahon seems a good bet for the near-term. Just supposing that Dahon stops distributing all spares tomorrow. If nothing else, there are many Dahon spares already in the wild, and will be available for puchase on eBay if nowhere else. Tern is a new company and doesn't even have that. (This is, of course, discounting the possibility of Tern and Dahon using any of the same parts.) 

If you want a Dahon, I'd go ahead and buy one. The company's not going anywhere just now. If the Tern bikes look sweet, when they become available you can pick one up. Just remind yourself that they're a new company and spares may or may not be available. And lastly, if you want to stay away from the whole mess, you have other options for folding bike brands, as has been pointed out. However, you're pointed out that your preference is to stay "in the family". In that case, is upgrading your current folder an option?  

(This question can't really be answered satisfactorily either way, and I hope that in time someone else will write better answer as more information becomes available on the Tern/Dahon rivalry.)