And this is what's on SteamDB.
"Added file – Asset/ui_c_upsellButtonLib.xxx (544.00 KiB)
Added file – Asset/ui_s_Upsell_InGameCom.xxx (64.00 KiB)
Added file – Asset/ui_s_Upsell.xxx (32.00 KiB)
Removed file – Binaries/Retail/ChromaAppInfo.xml (364 B)
Everything else modified 40+gb"
They're preparing to add some ads into the game for their next super hero game, and since I really don't see them adding ads for a Marvel game inside a DC game, it's either Injustice 3 or DC v Marvel. Most likely Injustice 3 tho.