The Comandante’s Canal
newyorker.com
newyorker.com
This canal could also dramatically impact the current shipping regime, although I don't really have the expertise to make specific comments.
On a personal note, I have visited Nicaragua, and can't help but think that the proposed canal would dramatically alter the country (currently one of the safest third-world countries in the world and certainly on a slow upswing into what many people picture as a second Costa Rica [dependent on politics of course]). In particular, I can only assume it would destroy Ometepe in its current form.