There will be huge demand for a rematch, and if he avenges the loss a rubber match. Then potentially a unification with whoever is holding the WBC title. :deal
he may go for wilders first, wilders not a draw and his fights generate little money so he may be tempted to take the money and travel to Germany for a klitscho belt. If that happens the klitscho fury rematch could be the unification one. Kilt will probably have a soft touch first I think to get a win before rematching fury july time at a guess.
I believe Klitschko should go for a rematch directly. Father time takes its toll. A rematch could draw huge attention since Wladimir had good moments in the final round. It will keep the interest and hopes of course.