Samsung is definitely going to launch a 5.9″ handset this summer, but whether it is coming under the Galaxy S6 Plus, Galaxy S6 edge Plus or the recently leaked Galaxy S6 Note name, is not clear at this time.
However, what is clear, is that Samsung Electronics trademarks the name Galaxy S6 Note with South Korean authority, which means that a new handheld device will probably feature an S Pen accessory. So what about the Galaxy Note 5 then?
Well, at this point, we are just as confused as you are, we can expect two new devices under the Galaxy S6 series and, probably, a Galaxy Note 5 this fall, too. Right now the information is pretty scarce and mostly unreliable.