Monster Hunter World will be getting a big update on April 19th. The patch will bring a new elder dragon, Kulve Taroth, into the game as well as a new location called the Caverns of El Dorado. Kulve Taroth "protects itself with a glittering coat of metal". The patch weighs in at a hefty 1.2GB for both PlayStation 4 and XBox One.
Kulve Taroth is an interesting type of dragon. His coat is metal and, with every sighting, it changes its appearance. Due to this, more investigation will be required. Players will be able to get hold of high-rank gear for both hunter and Palico.
As for El Dorado:
The Caverns of El Dorado are a peculiar network of caverns shaped and influenced both by the Everstream and the minerals that Kulve Taroth has collected over the years. Kulve Taroth's nesting ground—as yet undiscovered—is rumored to rest within the deepest region of the caverns, from which tremendous geothermal energies seem to emanate.
Learn more on the Monster Hunter World site.