The manufacturer may be sticking to its initial plans of unveiling the Galaxy S7 successor at MWC 2018 despite the continuing Note 7 troubles. Additional rumors point to a 5.5-inch AMOLED UHD display and up to 8 GB of RAM.
http://www.notebookcheck.net/Samsung-Galaxy-S8-leak-suggests-MWC-2018-reveal.181841.0.html