Ironheart has gone medieval in this third teaser for October's Champions #25.
The artwork by series artist Sean Izaakse coincidentally harkens back to Marvel's original Ironheart, Tony Stark, in 2000 alt-continuity Avataars: Covenant of the Shield.
All three teasers have featured the text "Change the World?" and "Weird..." leading us, at least, to speculate this could be concerning Weirdworld, which was re-introduced in Marvel coninuity back in 2015's Secret Wars and featured itermittently since then.
Champions #25 is scheduled to be released this October. Look for Marvel's full October 2018 solicitations later this week on Newsarama.