So, this season of SVU (22 years now, which is impressive for any series), we get the surprise return of Elliot Stabler, as well as his new series, Organized Crime with crossover between the two.

spoilers:
In the first episode back, Elliot's long time wife and mother of their kids, Kathy, is killed in a targeted car explosion as she and Elliot had plans to attend (in secret) Olivia's award ceremony. Needless to say, this derails the Stabler family (all of whom are back) and Olivia (whom had a personal relationship with most of them back in the day). Stabler ends up being "drafted" into a new unit, Organized Crime, which not only hunts such criminals, but has strong implications that a crime boss was behind his wife's murder. Of course, the Stablers are reeling from the loss of the matriarch, but Elliot is sent into an obsessed spiral, culminating in an intervention by his family (whom asked Olivia to help). Then we get the bombshell that had been waiting to be dropped for nearly 20 years; Elliot loves Olivia (and she had her own, if more subtle, ways of doing the same, even during Elliot's absence).

Where this will lead, I don't know. But both series are slated to have crossovers going forward.
end of spoilers