"Hey gang, the word is out with Marvel's revised solicits - I'm no longer co-writing Iron Man. Issue #16 is my last one with Dan Slott and the crew," Zub tweeted. "Another major Marvel project came up, absolute bucket list stuff, and I had to drop something to make it work. My apologies."
Zub joined series writer Dan Slott on Tony Stark: Iron Man with March 2019's #9. After September 18's #16, Christos Gage will step in as Slott's co-writer.
"Working on the series was a blast, but solo writing a series I've always wanted to tackle had to take priority over co-writing a series already tightly planned out," Zub continued. "Huge thanks to everyone at Stark Unlimited. I hope I get to contribute to the Armored Avenger again down the road."
The writer didn't say what the "bucket list" Marvel title would be, except that it wouldn't be a title edited by Marvel's Executive Editor Tom Brevoort of the Avengers office.
"With Champions wrapping up and my commitment to Iron Man finished, this is my first time without a Tom Brevoort-edited project going since Thunderbolts in May 2016," Zub said. "It feels...weird. Tom, Alanna Smith, and the Avengers office crew have been so supportive. I owe them, big time."