Just because he's not gone "Worldbreaker!" doesn't mean it's not the Green Scar persona. Aaron's Hulk picks up where Pak left off. Same guy.
Prepped as far as doing surgery to Hulk goes. Nothing in those scans suggests he had "anti-Hulk" tech or a magical safeguard put in place in case Hulk went nutso on him or his armor was specially designed to face Hulk. No need to make excuses for why Doom beat Hulk other than the fact that he did.
No, its not. King hulk that appeared in WWH was the angriest version of hulk till date sans worldbreaker. Aaron's hulk is just another appearance of gravage hulk who is intelligent but not as angry.
Meh, it wasn't a random encounter. Doom already knew hulk would come after him. I'm not making any excuse.
That wasn't the first confrontation Doom and Hulk had under Aaron. When they first fought when Hulk invaded Dooms castle (after he realized Doom separated him and Banner), Hulk took Doom out in two panels. Their second fight was a lil more emotional and Hulk was trying to get answers from Doom, not kill him (which he could have easily done since in the scans Jake posted, Hulk was ripping his armor and again, their first fight where an injured Hulk curbed Doom EASILY).With prep, no one is beating Doom though.
His power fluctuates regardless of the persona, but the current persona is that of the Green Scar (minus Banner). And Hulk was obviously pissed at Doom when he went to attack him.
Nothing about that encounter suggests Doom did anything at all to ready himself for Hulk in the form of contingency plans or added tech or specialized safeguards. Any speculation that Doom "prepped" for Hulk and made specific measures because of it is just that: speculation.
An angry Hulk who wanted to beat up Doom got dismissed by a Doom who wasn't even giving it his best effort. All there is to it, really.