The fictional man from Planetary #9 is Grant Morrison.Specifically, the Morrison Author Avatar that appears in comics (King Mob, The 7 unknown men of Slaughter Swamp, Mo-G, 'The Writer', The Architect etc.) The issue itself was dedicated to Morrison and in the final issue they mention that he moved on to other stories.
In issue 26, the power of Randall Dowling is not shown because it was deactivated by The Drummer before the former tried to use it.Said power is "stretching his mind to touch yours" and "grow clones of his mind inside others' brains"... now, human mind being information, it is evidently susceptible to The Drummer power, and his distorted informational space could disrupt a floating mind tentacle as much as it disrupted Suskind's cybernetic link to the goggles.
Randall Dowling's power doesn't work on superhumans.Think about it. Why does he even argue with the other members of the Four ever? Why didn't he stretch his mind into the Planetary team, Anna Hark or the City Zero survivors and their children? Because he couldn't! It is doubtful that the paranoid immortal superhumans from that alternate Earth would have ever allowed someone with a power like Dowling's to exist if it posed any threat to them at all! They almost certainly scanned the Four after they passed through the transformation device to see what the end result was. If any of the Four possessed an unacceptably dangerous power then they would have blown that space capsule to bits. Instead they allowed them to leave. So Dowling's power allowed him to stretch his mind into ordinary humans (probably the people that worked to build all of the Four's massive bases and vehicles), but he could never control superhumans, although he might imply that he could as a threat.