In Dragonflight, Professions as we knew them were completely revamped: gone were the days of simply crafting an item in one go; instead, players could craft, recraft, and recraft again the same items over and over in order to produce consistently stronger weapons, armor, trinkets, and profession gear over time.
One key piece to this system was Sparks — Optional Crafting Reagents that allowed players to adjust the minimum item level a piece of gear would be crafted at.
Based off our datamining, it looks like that system will continue in The War Within. We discovered Fractured Spark of Omens and Spark of Omens, which clearly follow the pattern of requiring a Spark to set item level beyond initial crafting capabilities.
It's very likely that Fractured Spark of Omens will be earned through weekly activities, similar to Splintered Spark of Shadowflame and Splintered Spark of Dreams that came before it.
While Professions overall have not changed much between Dragonflight and The War Within, it will be easier for players to prepare and plan their gear upgrades around a somewhat reliable system such as Sparks in crafting..