Of course Lawrence Alamain wouldn't let Katerina, the object of his obsession, show up in Salem without him being close behind! Crystal Chappell tweeted her real life hubby (seen in the above clip) would indeed be reprising his role on DAYS as well!
Michael will indeed pop up on DOOL.
Carly, Lawrence, Vivian, all that's missing is little Nicky. Paging Tom Pelphrey, or Greg Vaughan or Chad Brannon... Thanks Rocki345 for the tip!