Yeah, among the signs:

Batman is now using Lucius Fox as Alfred's replacement. Makes sense if Lucius's son is to take over the mantle.
Teen Titans solicits indicate that Damian's Robin tenure is ending, which would free Luke to recruit a new one.
Justice League's current arc is filler.
Justice League Odyssey is heading for it's endgame.
Legion of Super Heroes suggests someone is quitting. I wonder if it's Superboy, so he can come home and become the new Superman? They've also mentioned there being different 20th and 21st century Supermen.
Young Justice just added a few new members - because the classic four will be aged out?
Flash is heading for it's endgame.
Nightwing's Ric Grayson storyline is finally getting close to ending.