The OP has been provided with copies of lawsuits that sound like they may have been resolved one way or another. OP doesn't sound like they have any resources to assist in the matter.

This would likely incur additional expense on their part (as OP is unlikely to contribute much to the legal fight) and enable a competitor. One immediate impact to the bottom line and potential future impact by saving another competitor in the field.

Assuming the competitors are currently or have incurred expense in dealing with it, the only reason left (as I see it) would be altruism on their part in banding together with a competitor.

There aren't many examples of this actually happening for a reason.