Well, could you substantiate that with facts? The only ones i have read are that a new holding, yes, with Niki, will be build in austria that holds several new companies, one of them TUIfly which will (for the time being at least) remain in HAJ and germany under german laws. Niki does not have anything in terms of administration, operation departments and so on and has to buy that from a third party, currently airberlin, in the future most probably TUIfly as the remaining parts of airberlin won't have anything to do with the new Niki/TUI company.
However, yes, there is a targeted action against the airberlin wet lease planes, which directly risks all jobs at airberlin and of course all jobs on those 14 planes as well.
And yes, i would go to work and let my company and works council negotiate, which could of course end in legal industrial action. Not undermining them and their standing, portraying them as helpless puppet actors as the TUI personnel currently does.