Thread:MistofMists/@comment-39080707-20190525013631/@comment-31797469-20190525133123

They are hinting that there "might" eventually be another Island with Fire element monsters. But they are avoiding to even use the word 'soon', so we might have to wait for a while.

Currently we can expect the following to be released over time:
 * Werdos, 2 annually-ish. Next pair is probably on Water Island in the beginning of 2020.
 * Epic Monsters (14 more)
 * Rare Fire Element Monsters (7 more)

In addition to this, they might also release the following (but there is no official confirmation of any sort):
 * New Islands with 4 out of the 6 elements, there are more 9 possible such islands with the current 6 known natural elements.
 * Accompanying fire element hybrids, previously only available in DoF. (18 monsters, 3 of which are unknown)