I think there's a bunch of titles they will get from Activision that get overlooked. Classic Activision IPs like Pitfall!, Kaboom!, River Raid and Activsion O2 games that are not Tony Hawk (Shaun Murry Wakeboarding, Matt Hoffman BMX, Kelly Slater surfing) assuming they own those names like they do Tony's. All of the Sierra properties (King's/Space/Police Quest, Phantasmagoria, Gabriel Knight, SWAT, and maybe some of the Starsiege games) and classic Dynamix stuff (Stellar 7 and it's spin offs, lots of tank games and pinball stuff), ZORK, Interstate 76/Vigilante 8, BLUR, the Krondor games, Gun, Soldier of Fortune, Rise of the Dragon, and Timeshift.
I'm not 100% sure if some of those properties were sold off or abandoned over the years, but many of them have be republished by Activision on GOG and Steam so they definitely own those. But there is some things, like the Cyberstorm games, they are in the Starsiege universe, that are published by Activision on GOG even though they sold the Starsiege IP to Hi-Rez Studios years ago. Activision might have the US rights to Sekiro also. And there's a bunch of licensed games like all that stuff Activision Value published, but the licenses for most of that has probably expired. Oh, and Jurassic:The Hunted.