Although Shiller could indeed transport living beings between two worlds, the risk was incredibly high, especially when it involved the two protagonists.
So he had to unwillingly travel between these two worlds to undertake this reverse operation.
Even though there is a time gap between Gotham and New York, with Gotham still stuck in the 1980s and New York already in the 21st century, both Batman and Iron Man had their unique strengths and could complement each other in several areas.
Batman excelled in versatility, mastering everything from individual equipment to base construction and strategic planning. Stark had unparalleled prowess in machinery, where any mechanical invention posed no challenge to him.
Bruce was results-driven. Once a goal was set, his research and development speed was extremely fast, and the end product always exceeded 200% of the initial goal. Like this time, the Liquid Breeding Technology that Shiller brought to Stark was the result of his research on Venom. He extracted an active gel substance from Venom's body that could be entirely controlled by bioelectricity. Surprisingly, the entire research process took less than a month.
Stark's advantage was his boundless creativity and knack for resolving problems using innovative approaches. Furthermore, he had the advantage of being in a more advanced era, allowing him to bring cutting-edge methodologies and technologies to the table.
So what more is there to say? Reverse it!
After receiving another negative answer from Shiller, Stark did appear somewhat disappointed. He was in desperate need of a buddy with whom he could share intellectual conversations.
Obadiah was still unconscious, Peter was too young and clueless, Pepper could provide emotional comfort but had no understanding of science and technology, and while Shiller could provide life advice, he was only adept at changing light bulbs. It's no wonder Stark was disappointed when he finally met someone who could potentially have common ground in professional areas, only to be unilaterally rejected for communication.
If he had the opportunity, Shiller wouldn't mind bridging communication between Bruce and Stark. But the biggest problem was the different time flow in the two worlds, making even remote communication impossible.
However, Stark quickly regained his vitality after Shiller assured him that this collaboration would be ongoing, facilitating long-term technological exchange between them.
Having the chance to continuously witness the research findings of another genius ignited Stark's enthusiasm for research and development. He said, "Watch and see. Although I admit that the guy on the other side is pretty strong, he'll never be more brilliant than Stark. I'll prove it to you."
Having said this, he shook the piece of paper that Shiller had written on and said, "Let's start with this. All you need to do now is go back and tell him that he better come up with more brilliant achievements, or else I'll definitely take him by surprise and leave him feeling ashamed."
Unfortunately, Shiller thought, Batman's personality was different from Iron Man's. He wouldn't respond to taunting. If Shiller told Batman "someone is more brilliant than you," Batman would probably just nod and accept it, rather than jumping up like Stark, wanting to prove that he's stronger.
If both sides had Stark's personality, Shiller wouldn't be able to contain his joy. He would pass messages back and forth, taunting one side then going to taunt the other, instigating an arms race between DC and Marvel.
The two super-geniuses would start pushing each other, raising the world's technological level until even Thanos would sigh and Barbados shed tears at the sight.
Considering the potential of these two characters, this isn't entirely impossible.
Soon, in the research institute of Gotham University, Victor held a bunch of notes and said, "… His application of energy is quite interesting. I think he gave me some inspiration. This way of energy conversion could indeed be applied to weapons."
Victor spun his pen and said to Shiller, "Wait a moment, I will get you a blueprint... where is it? Oh! Here... I was actually planning to develop a freeze gun, but I've been too busy recently to start this project."
"Look at this, I call it the freeze gun. What do you think? It can freeze people into ice while maintaining their body's vitality. It can subdue an opponent without injuring them. I think in some police and civil fields, it would be extremely useful."
"This was initially to be applied in medicine. This is an extension of my cryogenic technology."
"I made it into a weapon because I felt the destructive power of current weapons was too great. I'm a pacifist, you know. If there were such a weapon that could completely subdue an enemy without hurting them, the possibility of subduing enemies in battle would be much greater than killing them."
Meanwhile, Stark, having seen the cryogenic technology data, said, "Interesting. Is this your other friend?"
"His cryogenic technology is indeed advanced, but I think it should be used more in ecological areas, like large-scale weather manipulators, and can also solve environmental problems like glacier melting."
"Of course, we should be cautious with this technology since it also has great destructive power."
"Freeze gun? His idea isn't bad, but the design is too poor. The efficiency is too low; it can only shoot once and then run out of power. Jarvis, help me analyze how to use this freeze energy more efficiently and make a sample for me later..."