I don’t know where to look at the big list o’ comics so I guess I’ll just ask here.
What year/month did Deadline’s big story happen? I know it was pretty late in the multiverse era and I think just after Vengeance, but the dates moved around and I’m not sure when that ended up after the post-it wall.
Also, did Deadline have any notable returns after his first story? I can’t remember if he tried again or just had the one attack on Earth.
December ’12: FF#752, Deadline event begins, major crossover.
Then the next time Deadline is mentioned is him becoming Lifeline
January ’15: TotB vol. 4 #62, Trickster Kismet (tied into the DC limited). DW* vol. 2 #1 relaunch. VotV vol. 3 #50, flashback with Naturalist and Deadline which sets up…
February ’15: Cosmic Redemption one-shot that sets up Lifeline and what’s going on with the Enclave moving forward.
So it was only one major attack that we know of.
If I look up first appearances regarding Deadline using WalkingTarget’s discord bot it gives this info: