Microsoft "theBad" windows vs. OpenSource Linux: Not eveything is lost

The Bad or like thy like to call themselves, microsoft, is tyining to bully Linux. Howerver, not everything is lost. Research reveals that all companies supporting Linux have a greater financial power than Microsoft.
The new goes that a couple of companies supporting Linux are depating wheather they should form a alliance against Microsoft which is threatening the open SourcCommunity with copyright infringement law sues. Should the participants of meeting choose to form a alliance to oppose "the Bad" which continues to gain momentum in the open source market, they will have almost 9 times tha market power than microsoft (397 billion USD compared to 44.3 billion). But what could the strategy against thue new bottem up attack of microft be?