Hmmm... So it seems MUT is forking to ARION and anyone who had MUT from block 120,000 is eligible to trade for the new coin.  According to their Discord (https://discord.gg/WwS9wdy) they will still be supporting MUT post ARION launch and hopefully even masternodes:

Nikita - Yesterday at 6:25 AM
Guys MUT and arion areseperate coins
we using MUT to swap for Arion to help fix the supply of MUT
Mut will get a fork and a fix of APR possibly even masternodes we still working on it but we have teams for both coins and we doing both coins
nothing will be left behind
1:10000

Hope that helps anyone who was wondering as I was where this coin is going.  Feel free to join the Discord if you want to further updates.