I'm new to Dumpshock, and I have been following this thread for a while (mostly to see when Vice might be available). For what it's worth, here's my lawyer hat analysis.
I don't know what Randall Bills's exact role in IMR is legally, but assuming he is an officer of the corporation in some capacity, he has a legally enforceable duty to try to get value for the owners of the company. At this point, the only asset IMR really has (as I understand it) is the licenses to produce Battletech and Shadowrun materials--without that license, there is no way for IMR to make money, and no way for the owners to get any value. Thus, Bills has a duty to try to hold on to the license, and take actions consistent with that goal.
People in a situation like Bills's, or really any kind of business decision, are evaluated by something called the Business Judgment Rule. The long and short of the BJR is corporate officers cannot be retroactively held liable for wrong decisions, or even stupid decisions, as long as there is some justification for the action at the time the action was taken. This is to avoid hindsight bias, and to prevent judges from having to evaluating business decisions, which they are likely not qualified to do.
As a pure hypothetical, let's say Bills was told by the "titans of the industry" that "Coleman is tight with the Topps people---if you push him out, you won't get the license from them. Period." Under that circumstance, Bills probably has an obligation to keep Coleman around---firing Coleman as a moral statement, knowing that it would lead to the collapse of the company, is potentially a breach of fiduciary duty. The exact opposite situation works the same way---if he was told "Topps won't renew you unless Coleman goes", he has an obligation to get rid of him (to the extent he can).
The middle path, where the unnamed "titans" tell Bills "I think your chances of keeping the license are greater with Coleman than without him", is probably enough to protect Bills's decision under the BJR. In fact, it's pretty much a text-book case of the BJR---Bills is acting based on the information he had at the time. Even if that information is wrong, there is a solid reason for acting the way he did.
There are many, many variables here---the exact financial situation of IMR, the ability/willingness of Coleman to make IMR whole, the relationship between Coleman and the other owners, the exact nature and reliability of these "titans", etc.---that make it impossible to truly evaluate the legal situation from the outside. However, on its face, I think Randall Bills's statement (taken as true) is perfectly reasonable and consistent with solid legal and business advice.