Activision is now reportedly under investigation for fraud, concerning their recent dealings with Bungie. Of course, everyone and their mum knows by now that Bungie have decided to split from Activision, but there's more to the story than it first seemed.
Activision fraud investigation will be concerning itself primarily with the financial dealings following the Activision-Bungie split, though there's not been much information shared as-of-yet on where, exactly, do the teeth of the investigation lie.
The current theory on why Activision is getting investigated for fraud is that investory aren't all that keen on the fact that the company's stock value has been tanking following the split, and that the rather respected law firm The Pomerantz will be looking into whether Activision was aware of the fact that Bungie would be leaving before their supposed 2020 contract was up.
The case rests on the idea that Activision was selling its stock to investors who thought they were investing in Bungie, too, only for them to ditch the publisher way before everyone thought they could. In short - it is possible that Activision purposefully withheld information about the split until it was public knowledge.
Since Activision did not, in fact, advertise the Bungie split, and it's a bit of a given that entire companies do not act like this on a whim, there may well be a case here, and Activision may well have to settle in the court of law sometime down the line.