I wonder whether the extensions are US only ? I understand that Disney has the capacity to protect their trademarks all over the world, but I guess that there h

I wonder whether the extensions are US only ? I understand that Disney has the capacity to protect their trademarks all over the world, but I guess that there has to be several countries where derivative works from the existing locally expired copyrights can already be created. So, in such countries, wouldn't it be possible to use the exact same characters to create new works (comics for example) if you name it differently ? And the corollary of that is how the copyrights/trademarks issues are handled by the various treaties negociated now (TAFTA, TPP, MEFTA, FTAA, TTIP). To be really effective worldwide, copyright extensions are to be validated everywhere otherwise, it would be of limited effect. So it would be interesting to know the extent of lobbying of powerhouses like Disney in those treaties negociations and their requests and proposals there.