What *had* been reported was that Heyman and Bischoff were not going to serve as on-air performers in these capacities, but rather strictly as behind-the-scenes showrunners (save, presumably, for Heyman's in-character advocacy for client Brock Lesnar).
However, the Twitter account for Sports Guys Talking Wrestling based out of Austin, TX posted a promotional ad for tickets they received for Tuesday's SmackDown Live in San Antonio. The graphic depicts an older image of Bischoff among various SmackDown talents, including Kofi Kingston and Bayley.
Some time later, the same account posted a similar advertisement for Monday's Raw in Dallas, which shows Heyman front and center among six Raw talents. While it's not uncommon for Heyman to appear on Raw for Lesnar-related angles, Lesnar's likeness doesn't appear on the advertising with Heyman.
WWE has made no formal announcement of either Heyman or Bischoff appearing on the respective shows, outside of their likenesses appearing on the updated promotional graphics.