The stage is set this March 1 at MWC 2015 for Samsung. A round of teasers brought up once again for their upcoming device (or devices?)
They had 3 teasers in total at Samsung Mobile Twitter page, Two of those were thru these screenshots which might refer to the next Galaxy's better battery life and maybe better multi-tasking or connectivity.
This one was a 20-second video which also has the same details from the 2 previous screenshots. #TheNextGalaxy hashtag has given attention to this upcoming device. I also wonder in that logo if this connects to either the Galaxy S6 or Galaxy S6 Edge