What kind of resolution is possible with direct imaging at 1400 ly away? I would imagine that it's probably milliseconds of arc within the field of vision of any telescope, so how close could we actually look at the planet?
To do direct imaging you really need to look at systems near the Earth, maybe a few tens of ly away. Then you can separate the planet from the star by enough that you can hope to mask the light from the star and still be able to detect the planet.
To get some idea of the techniques required to do this, take a look here: http://astrobites.org/2013/06/09/lowest-mass-exoplanet-disco...