Lynch was kayfabe "suspended" on last week's Raw by Stephanie McMahon, pending Lynch getting her injured knee checked out. Lynch responded by assaulting McMahon, and later husband Triple H on the following evening's SmackDown. Her forthcoming Raw appearance (her third one in as many weeks) comes under the pretense of her being invited to the show by the McMahon family.
As for Rollins, his appearance on Raw will be to address the attack by Brock Lesnar from the night after the Royal Rumble. Rollins has been sidelined with what has been reported as a back injury, and has been pulled from house show matches as a result. The injury is not, however, believed to be serious enough to jeopardize his Universal title match with Lesnar at WrestleMania.