Popular MTG mechanics Foretell, MDFC, Changeling, and Auto-Equip are here to stay
Head Magic: The Gathering designer Mark Rosewater broke down recent mechanics today through his second Storm Scale post and the probability of those mechanics returning in future sets.
Wizards of the Coast has been expanding upon successful mechanics over the course of the last few years, from Sagas that transform into creatures and other Modal double-faced cards (MDFCs) to Foretell and Magecraft. The popularity of an MTG mechanic helps determine whether the design team plans on using it, but it must also fit in with the overall design of the set and have a low effect on playability across multiple formats.