Following info from Per-Einar, LA7DFA:

Rune, LA7QY says he plans to be active as JX7QY from Jan Mayen at the end of March lasting through until the beginning of October (actual operating style and times unknown due to work pattern).

Meanwhile, Helge JX/LB4MI is ready to leave for Jan Mayen and also at the end of March. He will use an IC-7300 so there will probably be the first 4m activity from the island using a modest antenna.