Victor transformed into his titan form and it is his six arm titan the form of asura the destroyer and god of destruction and yes he knows about attack on titan he has seen all the episodes including the finale when he was alive and his favorite titan was the attack titan when eren yeager was an energetic and a hero before turning into a villain.

In one of the big parts of the cities of pentagram city causing destruction and havoc enraged wanting to destroy all beings and hell for good and won't stop till all are destroyed after what blitz and the gang have done and now all royals and higher ups would try to stop him but they will fail as his rage and fury has no equal and his powers has no limits and will fight anyone who dares try to take him down.

Unless blitz and the others redeem themselves for what they have done and for breaking his trust from the birthday party incident he will stop and leave back to his place outside of hell he would slightly accept their forgiveness but nor so quickly if blitz and the others make a vow to never go to earth and do it again or to other humans that are not bad then maybe he would accept their apology and forgive them but it will be their last and final chance to be spared and keep living with their own lives or he will finish them all off without any hesitation that includes all the royals and not to go after him either.

I had fun making this one hope you all like it as it was another idea of mine of what would happen if he was in Benmakescomics in the future of the next generation where all the ogs have their kids and friends ever faced or encountered victor the old friend and ally who used to be i.m.p's muscle and enforcer of the team when they were not born yet and only blitz and the others where going through their wacky comedic adventures and shenanigans. Willie and his siblings including tilla and others would ask their parents and others of who he was before and tell stories and be told of how awesome ans yet intimidating at the same time he was before right as he is back from wherever he vanished off to only to finish what he has started.