So here's the idea, after his death, Tony reincarnated as a Seeker on Cybertron, some time before the war.
But he ain't the only one, Natasha is too, but she, similar to her old life, is made to be an assassin, but she's actually given an inhibitor chip that forces her to follow orders.
During his life with his Trinemates, Ironjet would strive to help his Trinemates look to brighter pastures, all while trying to help them move up in life from being mere Seekers, Ironjet even desiring to be a scientist like he was in his past life, even having the idea of creating the Arc-reactor again for the purpose of replacing energon as the fuel source of machines, possibly even for helping Cybertronians as a secondary fuel source. He would even build himself a "matrix" built with an Arc-reactor and even implementing the coding for the time machine, giving him minor Temporal Manipulation(speeding up), and implementing his tech to himself. His Trinemates are Skydive(Femme, shorter then her Trinemates, meek but friendly, becomes the medic) and Nightflight(Mech, strong silent type, a nack for Science like Ironjet, but is more CNA sciences).
Natasha would be reborn as Shadowburn, a 1.1 presenter with Spacial jumping, entering the Shadow zone at will, and can forcefully pull things with her through the Shadow zone, for silent take downs. Shes actually a member of the Rescue-bot Caste. She was made an assassin for the Counsel, being trained to take down those the counsel want offline, those they want to stay in line, like Ironjet. When she's ordered to Assassinate him, as soon as he's pulled into the Shadow Zone, he immediately recognizes her body language, and deactivates her Inhibitor chip(you know he'd upgrade his Transwarp net thing so he can hack devices), and they have a tearful reunion. They and Ironjets Trinemates would then sneak off Cybertron as the war starts, stealing a Larger research vessel, which Ironjet would upgrade.
On there travels, I think Ironjet should find a Arachnicon Sparkling and take it in.
I should note that Ironjet Cold Constructed a couple of Minicons, one of which is a Spider Cassetticon called Web//tech. Cyber, a Minicon that turns into a Datadrive to interface with machines and computer systems(she would be Ironjets new JARVIS/FRIDAY). The other 2 would be similar Weaponizers. Wolfshot, a canid minicon that becomes a Sniper rifle. System-crash, a Gorilla shaped Minicon that turns into a hammer, that emits a short range emp on contact. Along with new versions of his old life robots, U and Dum-E.
They later go to earth. And eventually meet team Prime, when Nightflight meets Cliffjumper during an Energon mine raid(the one where Starscream was gonna kill Cliffjumper, but Nightflight saves him. Or they meet one of the Terrans(depending on which Continuitys you choose)