Not 100% sure it's Darlow, but it's a loan keeper who the owner is deliberately teasing the identity of via his PR mouthpiece in Barry Cooper. Whether it's a 3rd choice older player or someone who could challenge for No1 is still speculation.
However, many of the arguments made against signing a 3rd keeper would apply regardless of the specific identity of the player.
And if you look at what's being said about loans -its probably quite feasible someone who isn't going to be a regular squad member when everyone's fit, simply Because it's looking like 6 total loans.
But you can't simultaneously make the argument that the player is both coming in as an expensive, disruptive influence that will stunt Pandur and Racioppi whilst at the same time acknowledging Darlow has been content to play second fiddle for a lot of his career.
The 2 arguments can't exist by the same logic.
Darlow has consistently been at bigger clubs. If it is Darlow, he'd come back here with the expectation to play.