Exactly what it says on the tin.
Yu-Gi-OH! Arc-V will be serialized as a Manga (Comic) in Saikyo Jump starting with the May Issue (Which goes on sale around April 6th, 2015). Saikyo Jump has recently faced cuts in circulation, being turned from a once-a-month manga and toy anthology to an every two months manga and toy anthology.
For those familiar with Duel Team Zexal, this is likely very similar.
Source: Weekly Shonen Jump, Maxut
