Calling an EGM will not do any good...the deal with Stella is done as long as it hasn't contravened the Corps Act. That is, as long as ASIC finds that MFS is not required to put the sale to a shareholder vote.
I am positive no shareholder vote is required...there are many precedents here. Seven Network sold part of its media business to become a cash box, for example. PBL also did it with their media businesses. None of these required a vote.