Honestly, this is the sort of thing they have to say right now - the deal isn't closed yet, and saying they're going to dump him might lead to shareholder lawsuits, especially if the acquisition is blocked.
Realistically, there's a high chance that within a few months of the acquisition being completed he'll be expected to leave quietly.
Businesses learned long ago there are plenty of very easy legal ways of making people leave of "their own accord" by adjusting work environment factors to a point no sane person would stay in the position.
Realistically, there's a high chance that within a few months of the acquisition being completed he'll be expected to leave quietly.