The FAA recently approved a set of new departure procedures for KATL, and we included these in ForeFlight’s most recent data cycle update. The new SIDs are designed to make use of existing Performance-Based Navigation (PBN) technology, and will fully replace 16 of the current SIDs later this year. For now, however, these new SIDs are only to be assigned by ATC; flights out of Atlanta should continue to be filed with the current SIDs until the implementation is completed. A NOTAM to this effect has been published for KATL.
In addition to these replacement SIDs, a new WIGLE1 SID was published for use during special events, and is also ATC assigned only.
A flight plan using one of the new SIDs may be accepted by ForeFlight, but will likely be rejected once it reaches the ATC computer, and even if accepted, will only cause coordination problems for both ATC and the pilot, so be sure to review the NOTAM before filing so you don’t accidentally use the wrong SID and have your clearance rejected. Of course, if ATC assigns you one of the new SIDs, you can use ForeFlight’s Procedure Advisor to load the route information onto the Maps view.