Loads of wild speculation that he is coming in to replace Bruce, as a stop gap until Martinez/Rafa take over, to undermine Bruce and force him to quit etc. etc.
But in reality, none of that is as likely as a throw of the dice by Ashley to allow Bruce to continue and keep us in 17th.
If Bruce was even remotely close to being canned, why make this move? Dawson is highly regarded internally and will likely be promoted to caretaker manager in the event of Bruce leaving. Makes no sense to have this appointment other than to try and support Bruce.