MY "speculation", is Shane is coming back, behind scenes with the PD, to get "goods" on EJ and his money situation s/l. Shane can do that w/o getting caught, as he has oversea connections. Don't have any "speculation" on why Kimmie is coming back. I love the Shane s/l's with him investigating, not so much about Kimmie/Shane"s family relationships, as they are all boring to me. Kimmie,"Oh Shane, can we still make it work as a family?" Shane, "Kimmie? Give me a chance." over and over again. We already have that with Sami/EJ/Rafe.
Let the "love" s/l's "die" for awhile.
They need to bring back the s/l's of corporations take overs. Bring back the feuds of Stefno/ Victor/ Brady. This could also affect Shane's s/l's with espionage, his favorite kind of s/l's.