At the Winter TCA meeting, producer Dick Wolf announced that there will be a three-way crossover between 'Chicago Fire' and its spin-off 'Chicago PD' with the New York-based 'Law & Order: Special Victims Unit'. Once it's over, Chicago Detective Sergeant Hank Voight (played by Jason Beghe) and Detective Alvin Olinsky (Elias Koteas), Officer Kevin Atwater (Laroyce Hawkins), should be eligible for induction into the TV Crossover Hall Of Fame, having been spun off from 'Chicago Fire'.
This year's crop of crossovers began with the 'Chicago PD' premiere, when Christopher Hermann and the dog Pouch from the original series showed up. So Hermann should be eligible as well. (Not so sure about Pouch.....)
And I don't know if this will be part of that three-way crossover, but Detective Erin Lindsay (played by Sophia Bush) has already filmed a scene with Mariska Hargitay's Detective Olivia Benson from 'SVU'. (It could be the set-up for the coming crossover.)
This should show up on your TV screens after the Olympics are done....