Wolverine's first dream depicts him as a shadowy figure standing astride a mountain top. He's shown to be watching a battle taking place below him between two groups of Lupine's, one dark-haired and the other blond-haired. His next appearance is apparently in the same time, showing him throwing a dark-haired Lupine, who has just massacred an entire tribe of prehistoric men, in a fire causing him to be severely burned. He then throws him in a nearby lake, waking him up, before disappearing. In the next dream he leads an army of Lupine on Elephants into battle Wolverine's next dream depicts Romulus during the Roman Empire. Wolverine is an amphitheater witnessing the combat between two gladiators and a group of tigers. While one is badly injured, the other manages to continue on and defeat the animals. Turning to a waiting Romulus, shown as the emperor, he informs him that he awaits his decision. Romulus replies with a thumbs down, leading the Gladiator to decapitate his fellow. As the head rolls away, it is revealed to be another blond-haired Lupine. The final dream involves Logan himself. He is reminded of one of his first encounters with Sabretooth. He is in Japan, engaged in combat with Sabertooth and attempting to murder him as the Hand had ordered. Romulus appears and puts an end to the conflict, preventing Logan from ending Creed's life.
In the present day Romulus influence has only just now begun to be felt. Romulus augments the already formidable abilities of Wild Child. He then sends him to retrieve Sabretooth who is being held captive and interrogated by Black Panther. As Wild Child interacts with Creed upon entering Panther's Mansion, it is revealed that Creed is frightened by the mere mention of Romulus' name. Wild Child is able to retrieve Sabretooth, and in the process manages to wipe the floor with Wolverine, and returns him to Romulus. Romulus then manages to erase all vestiges of humanity form Creed's mind.
He then sets the wild Sabretooth loose on Wolverine as he invades the Weapon X program. Falling unconscious after loosing to Creed, Logan has yet another flashback. He recalls when he was himself a captive of the Weapon X program. He is in his tank, being monitored by the Professor and Sabretooth. Romulus then enters the room. He admonishes Creed for getting carried away, causing him to reply with obedience. It also reveals that Sabretooth has always known of Romulus and his actions. Romulus also makes an offhanded remark about his own knowledge of genetics compared to those of Xavier and Essex. His comment is confirmed by the Professor, who credits Romulus with the very existence of the Weapon X project.
After Wolverine had finished off Sabretooth with the Muramasa blade, Wild Child appeared to confront him. During their conversation he revealed that Romulus himself was responsible for Logan's flashbacks. He also let slip that two Lupines always emerge from the pack, one dark and the other blond and that only one can survive. This comment helps to partially explain the majority of what has been revealed about Romulus thus far, as well as Sabretooth and Wolverine's own rivalry. Romulus himself is then heard speaking, presumably from behind Logan, saying that everything Logan has learned about his past has been true. He then disappears with Wild Child, remaining undetected by Wolverine.
Known Motives He seems to be manipulating, since then, the lives of every lupine mutant, like Wolverine, Sabretooth, Wolfsbane, Feral, Wild Child or Thornn (Wild Child calls him "my master").
An example of which would be his interactions with Daken. He first revealed himself to Daken after the deaths of his adoptive parents stating that he was what the boy would one day become. He later had Wild Child spend months torturing Daken all with the simple message of "stay away from you're father". It has been shown that Daken has a strong sense of loyalty to Romulus, and implied that he sees him as a father figure.
He has some kind of link with Weapon X, because he was the Wolverine's adamantium injection promoter.
Moreover, he must have an amazing knowledge of genetics. He said that Charles Xavier and Mister Sinister were "fools who stumble around in the dark, trying to understand genetics". And he demonstrated it by reverting Feral and Thornn to their feral forms and eliminating the human part of Sabretooth's mind.
All we know about him is that he covers his scent with perfumed oils, and that, throughout History, he has been a barbarian leader and a Roman Emperor.