Will the Catalyst series of plugins from iZotope (Plasma, Aurora, and Cascadia) be available with NI 360 subscription?
Until such thing is announced then nobody can say for sure what is included with the N.I. 360 subscription.
You can always try asking N.I. Account Support but I doubt that they have anything for certain to add if not official yet.
In case that you need guidance contacting support : Please read : how to get support !