I've basically skimmed through most of this and I've read a lot of what people have to say.
There was a "Law and Order" episode that keeps ringing in my mind concerning this...
Basically it went down like this:
Halfway through an attempted murder trial, Company A files a lawsuit about information that was in the possession of Company B, was in a direct Copyright infringement and did not want it to be displayed. What happens is a bit fuzzy, but in the end, what actually occurred was Company A lost the suit quickly but the court ordered that Company B disclose all documents pertaining to the copyright case. Essentially, giving Company A the blueprints to their product so that they could "inspect" them.
In my mind, this is exactly what's happening right now. IB only suspects that Xenforo has copied their stuff, but has no proof. They'll get the courts to make Xenforo revile their core software. They'll take a look at it and "compare" it to their own. After IB figures out what new and improved ideas that are implemented in the Xenforo software, they'll hand it back with an apology, pay the few measly amount of money that they cost in business for Xen and then adapt VB4.1 with the improved stuff......
Please note that I could have this all wrong but this is what is running in my head, due to the timing and all that.